I'm with you for Bioshock, Im a big fan of single player campaigns, and it had some pretty cool, and intriguing concepts. Plus it was a beautiful game.
Is there a category for WORST game of 2007? I would have to nominate the PC version of Kane and Lynch. Aside from the MAJOR flaws in the game, the requirements were an outright blatent LIE. They totally screwed over PC gamers. Its too bad too. I loved the Hitman series.