Best game you ever got from a bundle?

Bastion, followed closely by Thomas Was Alone and Tiny and Big

My favorive would be Dead Space =) One of the few horror games I like.
There are other games from HB I haven't played yet, like Batman:AC and AO.

Fez. I don't know why, but I absolutely loved that game.

Borderlands 1 and 2, though technically I didn't get them from bundles myself. I traded them with people who got them from the humble bundle since I would only have gotten a low violence version had I purchased it myself

Dead Space 3

Gunpoint was highly underrated: lots of fun, very succinct, and extremely polished!

Metro Last Light