I'm of the opinion that the Wii is a lot like the PS2. Hugely popular, a lot of absolute classics, but a lot of junk as well. I think if you stick to games that don't require motion controls it's a really fun system with a lot to offer.
The motion controls in some respects do make the bad/shovelware games worse and some good games lesser of an experience. But it doesn't really bring the console down for me.
I think the WII U forcing you to use the gamepad for basically any kind of system checking, using the eShop, etc. is worse.