New super Mario, Super Mario Galaxy (WOW what an amazing game!!!!), Metroid Prime Triology (3 great games one low price!), Zelda, Mario Kart, Mad World (it's a cheap game now and crazy violent, it also looks like sin city), and Resident Evil 4 Wii edition (it's cheap and amazing!)
There are a lot of good games out on the Wii however almost all of them are Nintendo games. The only reason I buy Nintendo systems is play nintendo games anyway. The Wii isn't a real contender in terms of 3rd party titles. For that I own an Xbox 360. Seriously though all 1st party nintendo games are just top quality, I really love the fun, goofy, cheerful, and timeless games that company makes. Anyone one from 95 to the age of 5 can play and enjoy a nintendo game. Somehow Nintendo makes money off of games that aren't gritty, realistic, ultra violent, and you know what I'm just fine with that. I sometimes want a break from that and just enjoy the simpler times of my childhood.