Editing every AI draft to sound like you wastes real time. Ten minutes teaching AI your voice once means every future draft needs far less fixing after.
| Sample messages needed | 5 to 8 self-written messages |
|---|---|
| Setup time | About 10 minutes, per the article |
| Time on email | 28% of the workweek, per McKinsey |
| ChatGPT instructions limit | Up to 5,000 characters for Plus and Pro plans |
1. Collect five of your own messages
Pick five to eight emails, Slack or WhatsApp messages you wrote yourself, ones that felt natural with no help from anyone. Copy just the raw text.
2. Ask AI to name your voice
Paste those samples into your AI assistant and ask it to read them and describe how you write: sentence length, tone, words you use, words you avoid, then turn that into instructions for someone imitating your style.
3. Save it as a standing rule
Paste that description into your assistant’s custom instructions or personalization settings, or keep it as a note you attach every time you ask for a draft.
4. Test it on a real task
Give it something you actually need today, like telling your manager a report will be a day late, and see how much you still had to change.
5. Fix the profile, not the draft
When you catch yourself editing the same thing twice, like too many exclamation marks or too formal an opening, add that correction to the voice profile instead of the draft.
What you can now do
Every draft from now on starts closer to something you would actually send, so you edit less and send sooner.
Part of Making Life Easier With AI, a weekly walk-through of one small thing AI can take off your plate.
A worked example
You need to tell a colleague that your project status update will be a day late.
Before
I wanted to inform you that the project status update will be delayed by one day. I apologize for any inconvenience this may cause. The final document will be ready by tomorrow morning.
After
Quick heads up: the status update’s going to be a day late. Should have everything to you by tomorrow morning.
Ways to bend it
Slack and quick check-ins
When you use your voice profile on Slack, it sounds like you because the same sentence patterns work everywhere. Your team hears one consistent voice across Slack and email.
Messages to people who know you well
Close relationships can carry more of your actual voice. Your profile might emphasize the casual shortcuts you would skip in a first message to someone new.
Escalations and tough conversations
Bad news still needs your voice. If you tend to lead with the problem and the fix rather than softening it first, your profile keeps that directness even when emails matter.
When it goes wrong
The AI output still doesn’t sound like me even with the profile saved.
Pull the profile out and read it. Did you actually describe how you write, or did you describe how you want to sound? Test it by running one of your old messages through it: the profile should match what you actually wrote.
My profile works for some messages but fails for serious ones.
Your voice isn’t one voice. Add a note to your profile that names when it shifts. Example: formal emails to leadership still use your sentence length and words, but drop the casual openers.
Creating the profile is taking longer than just editing the draft.
The time saves only if you write similar emails regularly. If you send emails like this one or twice a month, the setup may not be worth it yet. Do it when you notice the same edit three times.
I added a rule to my profile, but the AI still does it.
Make the rule more specific. Instead of no exclamation marks, say: end sentences with periods instead of exclamation marks. AI systems respond better to specific replacements than to things to avoid.
When should I stop editing my voice profile?
When you have not edited the same thing twice in a row of drafts. The article says to fix the profile when you catch yourself editing the same thing twice. Once that stops, your profile is working.
When not to use this
This method assumes you write similar emails regularly enough that setup time pays for itself. Skip it for one-off messages, crisis communications needing a specific professional tone, or situations where you want to sound different than you normally do. If the recipient expects formal polish over your natural voice, or if you need to hit a very specific target (legal language, official channels), you may spend more time fighting the profile than editing a draft from scratch.
Take this further
Act as a blunt hiring manager who has read ten thousand resumes, not a career coach. I will paste my full resume and the job description I want. Rewrite the whole resume for that role, section by section, in this order: summary, experience, skills, education. Rules: every experience line leads with impact, not duty. Use bracketed placeholders like [8 percent] for any number I did not give you, and list at the end every placeholder I need to replace with a real figure. Keep it to one page of text. Plain formatting only, no tables or columns, so screening software can parse it. After the rewrite, tell me the three weakest claims that need evidence before I send this anywhere. My resume: [paste resume]. The role: [paste job description].
Takeaways
- Gather 5 to 8 of your own past emails or messages that felt natural, then ask your AI assistant to turn them into a written style profile covering sentence length, tone and word choices.
- Save that profile in a standing setting, such as ChatGPT custom instructions or Claude Styles, so it applies automatically instead of being retyped each session.
- Run one real task through the profile today, like a delay notice to your manager, and track exactly what you still had to edit.
- When you correct the same issue twice across drafts, add that specific fix to the profile itself rather than repeating the edit on each new draft.
- Write profile rules as concrete substitutions, such as replacing exclamation marks with periods, instead of vague preferences AI tends to ignore.
Questions people actually ask
How many of my own messages do I need to give AI to learn my writing style?
Five to eight emails, Slack messages or WhatsApp texts that you wrote yourself with no AI help and that felt natural when you sent them. Copy only the raw text, then hand those samples to your assistant and ask it to describe your sentence length, tone and typical word choices.
Where do I save a voice profile so AI uses it automatically every time?
Paste the style description into your assistant’s custom instructions or personalization settings, such as ChatGPT’s Personalization menu or Claude’s custom Styles, so it applies to every new conversation. If your tool lacks that option, keep the description as a note you attach manually to each drafting request.
Why does AI still not sound like me even after I saved a voice profile?
Pull the profile out and check whether it actually describes how you write, not how you wish you sounded. Test it by running one of your old messages through the profile and comparing the output to what you really sent. A mismatch there usually means the description needs rewriting, not the draft.
Is it worth building an AI voice profile if I only write a couple of emails a month?
Probably not yet. The setup only pays off once you are writing similar emails often enough that the time invested is recovered through faster future drafts. If you only send this kind of message once or twice a month, wait until you notice yourself making the same correction three times before bothering.
Can the same voice profile work for casual Slack messages and serious emails to leadership?
Yes, but add a note describing when the voice shifts. For example, formal messages to leadership can keep your usual sentence length and word choices while dropping casual openers, so the profile flexes by context instead of forcing one tone everywhere.
Sources
What happens next
Both OpenAI and Anthropic are expanding standing personalization layers, from ChatGPT’s custom instructions to Claude’s uploadable custom Styles, so saved voice profiles are likely to get easier to build and more durable across tools over the next releases. Watch whether these settings start syncing across apps like Slack and email clients rather than staying locked to one assistant, since that portability is what would make a single voice profile actually follow you everywhere.
