Tried to play some Diablo 3 while Max Payne 3 downloads off Steam, but that went about as well as you'd imagine. Think I might play the CoD Black Ops campaign again, I remember that being really enjoyable.
I've bought plenty of games because I felt obligated, but in general I only play what I want to play.
Pretty much this. I try to buy any games that look interesting and worthwhile, but probably won't make any profit. As a result, I own copies of both No More Heroes, Shadows of the Damned, Rayman Origins, You Don't Know Jack, and so forth.