I'm sure there were great titles on the Wii, but they are hampered by the motion controls. I find it a chore to play any game on the Wii that has them and it's kept me away from trying new games on the Wii.
As for this elusive "awesome" game. I'm referring to games like the Halo series, Mass Effect series, Elder Scrolls series, NCAA football, the Gears of Wars series, etc. that I play and love on my X-Box 360. If they were on the Wii (which i think the EA sports games are) they'd be completely impossible to play because of the damn motion controls.
Like seriously I'll pick up Skyward Sword, play it for 2 days, get irritated swinging the controller around and the character on the screen not doing what I need him to do then I'll give up for a week or two. Like I said, it's a complete chore and really drives me insane. Especially because I love Nintendo's first party titles and wish I could play them with a normal damn controller. And if the WiiU contains these same gimmicks and motion controls then that just sucks becaue again they have these great first party titles that are basically unplayable for me.