Play as u comfortably. It doesnt matter whether with acceleration playing someone good or no

this is and extact from http://gamedrone.net/2009/03/02/18-tips-for-quake-live-beginners/

"13. Mouse settings

You can turn off mouse acceleration in your mouse drivers and in Windows. Many beginners play better with this ‘feature’ turned off, because mouse acceleration takes some time to get used to, but some do prefer to have this setting remain turned on. If you’re not experiencing any clear issues like consistently overshooting targets then you probably don’t want to turn it off.

As for mouse sensitivity. The common way to calculate your sensitivity is by determining how many centimeters you need to move for a 360 degree turn in-game. For many pro players this is roughly 24 cm on average, which is low sensitivity.

Does that mean you should use low sens too? No, it doesn’t! If you want to be good then use the sensitivity that suits you best. Low sens does not work for everyone and many people do play better with high sens. I’m an ultra-high sens player at 6cm/360 and it works much better for me than low sens, which I’ve tried to get used to on multiple occassions. Don’t stick with a setting that doesn’t work for you!"

i use no mouse accel on a lows sens however when i started quake i played on a ultra high sens with accel i reckon if i stayed with it in the long run i would be shooting just as well (apart from really long range shots i guess.....) its just about getting used to it and as skulll says make sure it dont limit you. (whatever that means )

if you want better flickshots and accurate fast mouse movement go for no mouse accel

if you want accurate mouse shots ("detailed crosshair pointing") and better stability in air go for mouse accel.

I want to add that \m_filter 1 also adds mouse acceleration ..
the mouse accel. that m_filter gives i consider not constant since it does the average of the last two mouse input positions.
the adv is that it gives bigger "detailed crosshair pointing" then without it, but it gives also this "variable acceleration". ( mouse_x = (oldmouse_x + newmouse_x)/2)

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epsislow

stick with one comfortable setting and practice it and you will improve, there's no simple rule like "playing with (or without) accel would be better for you", it's individual, it's a question with no answer, although imo accel can help in the long run if you have bad hands or some parkinson-like disease

(vo0 doesn't use accel, sens 3.3/default pitch/yaw with an intelli 3.0, which is quite low sens, and he still ruled on cpm duels)

doesn't do a damn diff depending on your settings.

In the end, the setting which is best for you will give you best results and you will discover it other way round.

This might be with accel or without.