I have been using Mint for some months now as my primary OS (got Bianca on a Linux magazine and haven't looked back).
Most things I need are catered for (can't wait for a couple of improvements to the gimp and OO - not a mint issue I realise).
I've recently started tinkering with some Linux games. I'm no hardcore gamer, just wanted to have a dabble, but sadly games and my box don't seem to want to play. Open Arena, which looks excellent, hangs after a few minutes of play. Thunder and Lightening I had running once, after about 5 minutes of screen freezes and loss of mouse control - and although I loved it, it has yet to run again. GL 117 has similar screen-flicker/freeze issues and won't run properly... same with Brutal Chess. Basically no games seem to want to work.
I presume this is not a mint issue, and has something to do with my configuration....although given that everything else works awesomely..have no idea what may be causing the problem?