Wii
So I got a Wii a few days ago and it's great of course. But I think the best part is watching other people play it for the first time. I took it over to my parents' tonight and watching my mother beat the hell out of a boxer, well, it just about brought tears to my eyes.
If I have a complaint it's the lack of online multiplayer. I'm pretty good at tennis now and I desire to kick international ass.