If you like to be active you should get the wii.. but it does not get you that exited over stuff, all it has is simple game to play, no games on it are... well... intense or addictive. The wii also have a browser.But if your a simple person go for it.
If you emotional and like it that way... get the 360. It does not lack hard core games, an excellent 720p graphix, and live... but no browser. But the best thing is that you can check demos (same as the PS3 and Wii) but these demos are intense and last a long time. But live, you do have to play monthly or yearly.
(out of question) if you like high quality graphics and hardes core games, go for the PS3, even though its expansive its worth it. Every penny... you get 1080p (full HD) graphics, Online browser with Flash 8 player, and Java, XMB, WIFI, all those things and more. and also it gots chating systems, and free online gaming. Blu-Ray cd are expansive but full quility graphix.
Now you choose 360 or wii. Its your life not mines.