My list would be.
1) de Blob - Creative, eccentric and stylish platformer. Jumping with gestures and camera aside, it's one of the best games I've ever played. Ever.
2) Excitebots: Trick Racing - This game captures the essence of what I believe a game should be. Realism is put in the after-burner and crazy gameplay is in full view.
3) Castle Crashers - Just when you think the beat-em up genre was done to death, here comes one of the best games on XBLA.
4) Art Style: Cubello - Possibly the best puzzle game since Tetris. Addictive gameplay and challenging puzzles.
5) The Legendary Starfy - A platformer that shines like a star(pun intended). Probably the best "water" levels of any platformer, charming atmosphere, and solid level design. This game has quite a bit going for it.
Pixel Art can be fun.
