Muramasa: The Demon Blade was the first game where I was jealous of the Wii. Luckily it's coming out for the Vita. Little King Story had me interested, as well.
Normally I would answer this with Zelda, but the motion control aspect turned me off of a Zelda game for the first time. I also didn't care for the aesthetics or the Harry Potter atmosphere. The last Metroid game got such a mixed reaction that I would only consider it if I already had a Wii.
I know you said "not Rainfall", but honestly, they were the closest I've come to seriously considering a Wii. Actually, now that the Wii U is out, they're one of the reasons I'd like to have one of those, along with the X project.
Not much on motion controls, Mario, or platformers in general, so the Wii never held much appeal for me.













