1. Zelda Twighlight Princess, as long as you don't try to beat it in a fast time this will last a long time without getting boring....but constant play will make it boring lol.
2.Resident Evil 4 Wii Edition
3.Guitar Hero III and do what the other guys said about returning it
4.Medal Of Honor Heroes 2, and get a wii zapper with your x-mas money from family to go along with this game
5.and last but definitely not least Super Mario Galaxy