Well, I feel I've had my Wii long enough now to come up with an informed top 5
1> Resident Evil 4 - Just awesome gameplay throughout.
2> Guitar Hero 3 - Rocks your socks off.
3> Super Paper Mario - Classic brought into the 21st century.
4> Tomb Raider Anniversary - Another classic with the Wii twist - Must have.
5> Big Brain Academy - Great gameplay & keeps your brain fit too!
At the other end of the scale ...
Smackdown V RAW 2008 was a big disappointment for me.
The actual wrestling engine is excellent - very arcade-y, but I still had to go out and buy the game for the PS2 because of all the missing features.
The new Wii controls should have enhanced the game's features, not replaced them.
Definitely a candidate for the ol' Name-And-Shame.