I'll buy anything not published and DRM'd by EA.
Then I guess you'll buy Bioshock. And you should, too. For those of us interested in videogames as an artistic medium, this is one of the most exciting games out there.
Portal, on the other hand, or Half-Life 2... Those games seem to get dismissed by the "games are art" crowd, or at least not brought up. I've never understood that. And Psychonauts, Killer 7, Shadow of the Colossus... But I think that the real innovative games don't get the same level of heralding because people who find those games know that games have been artistic since at least the NES stage. Final Fantasy II/IV, anybody? Zelda?