I have played the following in 3D:
Gears 3
NBA 2K12
Halo Anniversary
Ghost Recon
Batman AC
Assassins Creed Revelations
Blops 2
It really depends on what type of 3D they use. For NBA 2K, I thought it added some nice depth. Same with Batman. I played online with Blops 2 and it was to much, campaign was ok. Halo and Gears are my favorites, I have yet to play any Sony games. All in all, nice to have once in awhile but after an hour or so it gets a little much on my eyes.