for me,
top of the list is definately:- Mario Galaxy
then
Zelda, Twilight princess.
following by...
Wii Fit
mario,sonic olympic
cooking mama
Rayman 1
Rayman 2
Wii Sports
Fishing Master aka 钓鱼达人
Mario Party 8


out of the top ten list but still worth playing games are...
trauma, second opinion
Wii play(abit childish)
Wario Smooth Moves( quite nice)
paper mario