Kenryoku_Maxis on 19 February 2010
The 5 games I would recommend to any Wii onwer would be:
Muramasa: The Demon Blade
Super Mario Galaxy
New Super Mario Bros Wii
Super Smash Bros Brawl
The Legend of Zelda: Twilight Princess
After those, its pretty much up to your tastes and a lot of games are on the border. Little Kings Story is good, but also not for everyone. Same with Zack and Wiki. Tatsunoko vs Capcom is also good, but mostly fun for those who like the 'Vs Capcom' series. I also suggest things like the Metal Slug collection, Pinball Hall of Fame: The Williams Collection and all the LEGO games.
Six upcoming games you should look into:
Essay Pro