I'm trying to find a mouse that'll be comfortable to use for long gaming sessions. I use the claw grip, and my hands are quite small. I prefer build quality over having many buttons, but since I do play many RPGs and a couple of MMOs, a mouse with at least 7 buttons is ideal. Most importantly, I don't want to pay a lot for something that I know has a high chance of breaking after a year or less of use (as some Razer mice do, according to many user reviews).
If you recommend a mouse that you have personally used, please tell me what made it great for you!