Well... despite the face that I haven't played it yet, I will say Tatsunoko vs. Capcom: Ultimate All-Stars is my favorite.

I mean, look at this!!

Ok well, I don't know I have many games. Uhh... I'd say the internet channel but that doesn't count. So then its either PBR or Spectrobes origins.
EDIT: And MKW

I suppose Brawl, simply because I don't play any other games all that often. Oh how I wish there were more really good Wii games!

Despite the fact it's not out yet, Super Mario Galaxy 2 is my favourite.

1. Tie between SSBB and MKW, because I play them a lot.
2. Pokemon Battle Revolution, because it's fun to battle in 3D. Plus, you get TMs.
3. Super Metroid. I know this isn't a Wii game, but it's fun to play the demo in Brawl. And once I buy the full version I'll know a bit more about the story so I won't be confused when I get a Metroid game for the Wii. (Any suggestions?)

I'd Say SSBB, Since thats the game I spent the most time in so Far.

Currently, my favourite games are Super Mario Galaxy 2 as well as New Super Mario Bros. Wii.

Well it's easily the wii game I spend most of my time playing, SSBB.

Super Smash Brothers Brawl and Sonic Unleashed. They're great games and if you don't have them I suggest renting or *buting them

EDIT: *buying

Super Mario Galaxy 2

Metroid Prime Trilogy would be mine, but that's just a collector's disc with updated versions of the Primes, so my next one would simply be Metroid Prime 3: Corruption. It's the most immersive Metroid game ever, and the best of the Primes.

As a sidenote to LucarioMario, Super Metroid was an SNES game made solely for the purpose of 2-D platforming/exploration, and if you haven't played the NES Metroid and Metroid II for GameBoy it won't make sense. The Metroid Prime series are FPS games in 3-D.