I had 2 Wii's at one point then decided to sell the extra as I didn't need it. But it's a great system that introduced a new way of playing that is more accessable for people and a whole new dimention of gaming.
Its a bit odd at first to interact with you TV by movement rather than button response, but it does give this immersive appeal.
One game I suggest to try on the Wii is No More Heroes as makes good use of the Wii controls. So you position the 'Mote if you are going to attack hi/low and use both the knunchuk and 'Mote for wrestling moves.
The graphics aren't as good as other systems, but I'm old skool and I go more for gameplay than anything (and after that, story) so the Wii does appeal to me.
(I did do a blog about the 360 in which I compared all the system of this generation and the Wii came out second -
360: Good, but a wounded last | two3Blog)