The Wii is one of those things that normally I wouldn't take a second glance at, but sometimes when we've had a few drinks and what not, it is good fun.
I used to play a game with DS1 quite a bit, but we completed it about 5 times over and he still want's to play more, so I limit it now, it get's so boring after a while!
DS1 got it for his birthday last year, can honestly say that it is the one thing, in fact his PC as well, but those two things are the only things we have ever spent a fair ammount of money on for him that he actually does use, almost daily. He will dip in and out of his Nintendo DS and PSP, but always comes back to the Wii, and the playstation hasn't been touched since he got the Wii.
He got that Boogie for xmas, it is great LOL