Wii Boxing? Really? I thought that was the worst one on there, along with baseball. I love the Wii Tennis and Golf.
I like boxing myself, although sometimes I do find it a little unresponsive(such as my Mii trying to punch when I'm really trying to make it dodge to the side), but I don't go all out like my older brother. It's supposed to make you make some sort of strategy.
Baseball's only fun when you can actually hit the ball, and most of my family s**** at it.
The others are fun, too, though. I'd say tennis is the game I s*** most at, but it can still be fun to play once in a while.