Well, I don't know if you only play console games, but there's some awesome games coming out, for the PS3 anyway, next month that's worth looking into. If not, save up for Dead Island, looks pretty amazing, and that should come out on the PC too ^^.
Yeah it is a rather cute game, it's just a little different with how it looks and is build up and such, so was just a suggestion. Thief was a good game, I had it on the first Xbox, though it was freaking hard really, I was so confused that I gave up playing it at some point. Then one day, I started over again, and I finally figured it out xD. Splinter Cell was the game I used most time on though, at that time, was an awesome game ^^.