I think what You have to remember is that it is a handheld game, and you lose certain advantages of console games like a bigger screen more control options and the like. You also have to make the game easier enough to get into that someone can play it on the go and thus start and stop very quickly.
Longtime listener, first time commenter, great show as always. My personal Picks
5.Portal 2
4.deus ex
3.infamous 2
2.dark souls
1.Skyrim
Most surprising: Deus Ex
Most Disappointing: Batman: Arkham City
Worst game: Duke Nukem