Winter!: Prepare for holiday gaming!
There are a lot of things going for Braid... gorgeous art style, excellent music and the experience just being a breath of fresh air to the XBLA library. I believe it set a precedence for the quality and of artistic style for XBLA games at the time. This one will always be memorable to me for the clever use of time manipulation for puzzles of which I hadn't quite ever experienced (made the brain hurt).
I was also impressed by the fact that all puzzles, except for one I believe, was solvable upon reaching it. You don't earn new abilities or anything, but you may find yourself skipping a puzzle, learning some new concepts on the later levels, which then triggers that special "aha" moment... You get to go back with your new-found knowledge to conquer what you may have previously thought was impossible. It's a good feeling.
Game Traits applied to Braid (X360) by Crazyhowie