You guys should play around with the sensitivity (calibrate) option in the config menu. I've set mine to 0.4 and even though my right analog stick still shows up as "twitching" in the test dialog, it doesn't act up ingame anymore.

One thing I noticed is that PC controllers tend to be less durable. My logitech gamepad died within a year of use (dpad started acting up, down arrow = left arrow, etc), another one before that within half a year (OX buttons sometimes didn't react). Now I'm using my PS2 controller with an adapter which has been working fine for about 7 years already, despite the occasional abuse