We're really liking Mario Kart! I'm not a fan of the steering wheel though, I usually just steer with the remote out of it. I tend to oversteer if it's in the wheel.
Greg (hubby) seems to like the wheel, though. He usually wins, but I've never been a big gamer...and he's been playing forever.
We both love the Wii! I haven't even looked at Supersmash Bros. yet. I don't think Greg is super-excited about it, even though we bought it.