i have to disagree with you about bioshock and MP3....I own both and i enjoy bioshock way more...but it is a personal opinion.
I love Bioshock art-deco and creepy atmosphere. Its not scary but you get involved in the story pretty fast.The unreal engine work great and the water effects are incredible.
I like MP3 but i really dislike the fact that this world its kind of made for you and your stupid morphball ability. The graphics are good for wii but overall its not really impressive. I really enjoy the controls but there is way to mutch scanning for me.Anyway maybe i'm not a real fan of metroid prime....i just exchange my copy for a copy Gears of war. I don't regret it.
My wii is collecting dust right now i only REPLAY RE4 and TWP.