SSX Blur has great controls, some of the better graphics on Wii yet, and I think it's really fun. Lots of stuff to do, too. It's a snowboard game. Normally I'm not one for snowboard games, but the controls are easy to use, and instead of having to memorize obscure button combinations, you can now do backflips and spins at the flick of your wrist. The larger and more rewarding Ubertricks take a bit of practice to pull off, but trust me, once you know how to do them, it becomes second nature. As such, the game has a bit of a learning curve, but the more time you put into it, the more rewarding the game becomes.
The Godfather: Blackhand Edition is great, too. If you don't know what it's about - it's a free-roaming sandbox type game where you play as a member of the Corleone gangster family, and you go around extorting money from businesses, battling rival mobs, etc. The story is based on the Godfather, obviously, so expect the story to be good.
Furthermore, I hear Super Paper Mario is awesome. It's a platformer much like Super Mario Bros, but with excellent dialogue and some RPG elements sprinkled on top. It's got style and win oozing out of every crevice. Super Paper Mario hits US shelves on April 9th.