The one that's not a PS2 port with tacked on graphics is the one I'm looking forward to. Something that actually uses the potential of the controls in a real way and pushes the graphics beyond what was possible on the GC. I'll take a platformer, sports title, anything really as long as it's not another port or some game I could get for the cube for less than 10 bucks but now I have to pay 50 because it's a new Wii game.
Also Guitar Hero, SSB (never played one so I'll hold on for the Wii one as most new games seem to be about the same but Wii'd up like Mario Party), Brain Age should be cool too.
Paul