put

sensitivity X.XX

where X is your sensitivity in your class configs.

That said, I wouldn't recommend switching sensitivities on different classes as it will cause issues with your muscle memory and may make it harder for you to develop your aim. If you really wanna play around with something like that though, perhaps try mouse acceleration.

Lots of players do it, and it works fine for them. There's something to be said for grouping sensitivities, though. For example, scout sniper and heavy having the same sensitivity makes sense because they're all hitscan-only weapons. Demoman has a unique style of aiming, as does the medic, so them having their own sensitivities makes sense. Having a custom sensitivity to make rocket-jumping smoother on soldier is common to my knowledge.

i play different sensitivities for all of my classes
i think it's just preference, and i don't think it hurts me to play it like that

i was also thinking of setting certain sensitivities to different classes but everyone always told me it was bad for your muscle memory. i have stuck with one sensitivity and you get used to it for all classes.

Soldier, Scout, Demo, Medic and Sniper all have unique aiming styles due to their weapon loadouts, their movement speed and movement styles. I have a different sensitivity for each in order to get the most out of those differences

However I recommend that you take it slow to begin with and get a good understanding of how you aim with your mouse before you start changing the sensitivities around.

Why wud u do that r u retarded

buy HOW do you do it, there may be different reasons not to but CAN you do it?

why necro

sensitivity X.XX

create text documents in your tf/cfg folder for each class: scout.txt, soldier.txt, pyro.txt, demoman.txt, heavyweapons.txt, engineer.txt, medic.txt, sniper.txt, spy.txt

put "sensitivity x" in each text file and save it. (replace x with a number. go into console and type in sensitivity and it will autofill with your current sensitivity, use this number as a reference for how much slower/faster you want your sensitivties to be for each class)

rename the .txt files as .cfg files (scout.cfg, heavyweapons.cfg, etc)

you now have a different sensitivity for every class, assuming you put in different numbers for x.

You could just do:
alias sensitivity1 "sensitivity x"
alias sensitivity2 "sensitivity y"
and then put which sens you want in each class file.