Dig in man. You'll love it. As much as you'd think they're crappy, Wii Sports is by far the most fun I've had with that damn machine. It's awesome. You'll have sore shoulders by the end of the week.
I also have Legend of Zelda which is fantastic if you're a Zelda RPG fan.
My kids have Rayman Raving Rabids which is good for the entertainment value alone and the mini-games are really good.
Plus they have Cooking Mama Cookoff which is interesting. Not the worst Wii game.
Sadly, I have Medal of Honor: Vanguard and I have to say it pales in comparison with any other WWII games I've played. It's so bad that I'm moments from listing it on Ebay just to try to recoup some of the money I spent on it. I played through it on medium and rarely died. I tried to play it again on hard and it wasn't really fun the second time through. I say stay away from it.
Luckily there are a lot of new ones out to check out. I think the Sonic game gets good reviews and Mario Party looks cool. Hoping for an all new Mario Kart. That would rock on Wii.