A mouse that won't break after a couple of month of intense gaming, meaning I might press button much more forcefully than actually needed but that's just what happens when in the middle of a kill streak, I get all excited and the mouse suffers. And it's even worse when I'm losing
Seriously though, I've thrown away so many mice whose micro-switches just gave out on me. Sometimes they'll last a while, others only a couple of months. Not one seems to last much more than a year. Some other time it's not the switch itself but the plastic bits that press on it. In any case something always breaks.
Now I really wouldn't mind paying more for a sturdy mouse, but none of the tests/reviews ever seem to care about that aspect. (Some manufacturers tell you about millions of clicks, but of course they only test normal light clicks)