I usually dont buy games- but when I buy one I make sure its good, I ask friends, look at reviews, make sure its worth the money etc...
The only games I own are:
Halo (pc) (I got this about 6 mos. ago)
TES 3: Morrowind (got that like... 2 years ago, and I might get Oblivion)
Starcraft + expansion (4 years ago)
Warcraft 3 + expansion (3 years ago)
and thats about it.
Live the life you love, love the life you live