Based on your likes, you will probably like Elebits, Zack and Wiki, Rayman Raving Rabids, and sonic and the Secret Rings.

I haven't played yet, but based on reviews, you may also want to consider Geometry Wars: Galaxies, and LEGO Star Wars: The Complete Saga, Mercury Meltdown Revolution.

i would also like to reccomend the godfather

I have Mercury Meltdown - great game for $19.99, if you like that sort of thing.

for that price mercury is a great deal,and it is a great game

if you have the money get guitar hero 3

I'm shocked no one said the new trauma center! It's supposed to be awesome!

agreed MMR is a great game at a great price.

Circuit City had Red Stell for only $10 for today and tomorrow.  It's a hit and miss game, people liked it or hated it. 

MLB Power Pros is an excellent baseball game.

Medal of Honor 2 Heroes is supposed to be the absolute $h!@t. Also Guitar Hero 3 was awesome. Still is I have to say. Batallion Wars 2 should be really good.

Umbrella Chronicals too. I just played it early............my son is getting for xmas so I had to make sure it worked!...............it is alot of fun.

Medal Of Honour Heroes 2
Metrod Prime 3
As others have said Godfather and Mercury Meltdown are good buys also.
Also I loved Kororinpa, its a bit like the old marble madness game....