MadWorld, No More Heroes, Okami, Super Smash Bros. Brawl, The Conduit, Muramasa: The Demon Blade, Punch-Out, Sin&Punishment, etc. If this doesn't convince u to buy a Wii, well at least I tried. =)

The Wii is the only true video game console, as the other two systems try to do everything, which extends it out of the video game console definition. Sort of like a cell phone that plays MP3's isn't exactly a MP3 player (like the original iPods)

great games with non gimmicky controls:

mario kart wii (use of classic pad possible)
super smash bros. brawl (use of classic pad possible)
mario galaxy*
zelda twilight princess*
no more heroes
medal of honor heroes 2
pes 2008/09 (alot of infra red pointer use so dont know if you`ll like it)
excite truck
resident evil 4*
metroid prime 3*
okami*

*good/great story long play time

I'll play along -

Metroid Prime - Corruption

Get the wii because its a novelty experience.
You will have a blast with motion controls for a few weeks.
Then you will have a blast with the back catalog of great nintendo games for a month or 2...after that...err...you will use the Wii browser to check Xbox.com and see if you 360 buddies are online playing halo 3. ;)

Baggins, the Wii has tons of Quality and if the ones listed so far dont convince you then you might be the one with a problem

Master chief plays wii

Case in point: look at the display pic :o

Buy one.

Look if you don't see the charm in motion gestured mini games like Warioware, which are fun to play with people around, then what's the point?

It's like trying to convince someone who is lactose intolerant to have a delicious milkshake.

Proud owner of Wii, who naturally feels its appeal.

Well i have 3 nieces that don't give a **** about metal gear 4, final fantasy, motorstorm 2 or any of that so i need to get me a wii because i would really like to play with them and from what i have seen the wii is ideal for them, but i need more reason to get one, because i want to play it when they are not there too, right now am extremely interested in all the metroid, all the zeldas and mario galaxy, but since i can get almost all of them on a gamecube i cant make my mind if i should buy a wii or a gamecube