Hello and welcome to wiichat, enjoy your stay.
Well the game you should get should reflect the type of games you like. Some good titles ive played so far is
Zelda Twilight princess(great game),
Medal Of Honor:Heroes 2(Amazing FPS for the wii! Plus it has 32 player online! )
Dragon ball Z Tenkaichi 3(Probably the best fighting game ive ever played also it has online)