Ones I regret purchasing would probably be Sacred 2 : Fallen Angel, Fallout 3, GTA IV, and Rage.  Just didn't like them.  Sacred 2 is very restricted in characters, Fallout 3 and Rage are both too far into the future for me to enjoy them being open-world.  Skyrim and the new Dragon Age are/will be much better for me.  As far as GTA...Saints Row >>>>>> GTA. Every time. IMO, anyway.  I like to make a character on there that looks the way I want to after transition.  In IV, choosing the pitch of the voice made it even more realistic for me, too.  I could give them plastic surgery and further their transition.  Plus, SR is, like, hilarious and almost insane in its quality, to me.