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Another vote for the Wii here! I own both a 360 and a Wii, and while the 360 does have some great games, the games I've had the most fun with so far are on the Wii. The recently released Madden 09 on the Wii is LOADS of fun, especially if you play the 5-on-5 mode with friends.
 
As someone that owns both a Wii and a PS3, I have to say that our Wii gets more use overall than our PS3. Of course the PS3 is a great console that is much more powerful and it still gets a lot of use here as a Blu-ray player, but the Wii gets a lot more play time. My wife in particular who is not much of a gamer at all loves Wii Sports and Wii Fit. Mario Kart Wii is a blast to play as well and has a great online mode. For more casual gamers like we are, it's definitely the console to have.
 
I have to admit, in my first post no less, that I have all 3. PS3 for blu ray. Xbox for online gaming, and Wii for being just plain fun.

Still in the long run, I like my PS3 more. Until downloads (looking at you Apple TV) can do 1080p with DTS HD as the sound, I won't switch over.
 
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