i think it mostly depends on your lifestyle, if the only games you like are GTA IV, shooters and this stuff i don't think it fits to you
if you like more happy games, like Mario, Pikmin and so on, it really deserves buying!
but there are a lot of people that say "Wii is simply not for me"
if you are energetic for instant, Wii is for you as well, if you find it boring sitting on a sofa for example, like me : P
Zelda and Metroid are top btw, Monster Hunter and a lot of core are coming and i believe after 2.5 years of Wii there are enough AAA to keep you busy, and the best are still coming, so if you think it fits to your lifestyle, get it
if you find out it's for you, and you've never played Nintendo games before (like me) you'll be having a blast with it!
if you enjoy local multiplayer a lot is another reason, and if you find Wii graphics good enough it's even better!
balance board also feels great in crazy games like Rayman Raving Rabbits and Shaun White Snowboard
don't mind my username, that was more than 10 years ago, I'm a different person now, amazing how people change ^_^
