I'm a freeware games conniseur, not because I don't like commercial games, but because often these community developed games have a lot of flair - even if they do lack the multi-million dollar polish.
I decided about two years ago I was going to stay out of the warez games scene. For me, this has been a positive thing in several ways. First, I know it's the "right thing" to do. Second, I have found this means that I actually put more effort into games I purchase. Third, I probably spend less time playing games in total (however Mel would probably say that I just spend more time playing a smaller repertoire of games).
On the commercial front, I stick mainly to Company of Heroes - in my opinion one of the best games ever (taking in to account ongoing support from the developer and the great community).