I have been in love with mouse acceleration ever since I discovered RawAccel; it’s nice to be able to flick to quickly flick and have slow aim as a gradient.
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In Team Fortress 2 I can easily adapt to different aim styles; classes have different aim styles, so aim adaptability is useful.
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In Enter The Gungeon I can quickly peak at enemies and change my aim.
Why is mouse accel still hated?!
It depends what you like.
I find it really hard to play with, but it can work well for other people, such as yourself