I haven't actually played 10 Wii games, so I'm not sure how valuable a list would be from me. This lack of 10 games isn't an inditement of the platform at all, though. I love our Wii. I'm just not an uber gamer like most here, and I have young kids that take up a lot of my time. No, I don't have a 360 or PS3, so those aren't getting all my play time - I simply don't have the time to play, let alone the money to buy, most of the games I would like to.
So... of the games I've played, here is my top 6, I think in order but subject to change at any moment:
1. Animal Crossing: City Folk (I put a lot of time into this game and really enjoyed it and I plan to get back to it again at some later date)
2. Excitebots Trick Racing (fantastic game that definitely needs to be picked up by more CAGs!)
3. Pinball Hall of Fame: The Williams Collection (I can't wait for the new game in this series!!!)
4. WiiFit (yes, I like it.)
5. WiiSports. I'd probably put this higher, because I really do enjoy it, but my kids don't like it that much and as a result I haven't played it that much. When I do play it it's a lot of fun.
6. Mario Kart Wii
Here are games we have that I have not really had any time to play, but at least some are likely to end up on such a list once I do:
Super Mario Galaxy - my kids have played it, but I have not. Obviously I need to get my act together, but I'm a lot more excited about New Super Mario Bros. Wii then this game. I'm a 2D platformer person - 3D can be really obnoxious in platformers, IMHO, though I'm sure this game is great as far as such games go. It's likely I'll have played New Super Mario Bros. Wii to death before I get around to playing Super Mario Galaxy.
Zack & Wiki. It remains sealed on a shelf. I just haven't had time to jump into this yet, but I am looking forward to it. I keep meaning to start it, but then play something else.
Resident Evil IV Wii. Ditto.
Godfather: Blackhand Edition. Ditto, I think, but I don't really know much about this game. Got it for $5 at kmart.
Super Paper Mario - has gotten somewhat mixed reviews, but my 8 year old has played this quite a bit (though he hasn't finished it), and I helped him in parts and really enjoyed what I have played of it. We loved the previous two Paper Mario games and I didn't really have any qualms with the change in play form of this game at all. I will definitely make a playthrough of this when I find time for it, or at the very least will sit down with him to finish the game on his save. I'm not really sure why I haven't fully played this yet.
EDIT: some others we have that I forgot about, and are games I haven't dove into yet:
Boom Blox - haven't gotten to it yet.
Endless Ocean - I got this for my youngest but he didn't get into it, so I haven't played it either, but do want to at some point. Definitely need to do this before the sequel is out.
Here are the others games we have that definitely wouldn't make a top 10 list for me:
Sonic Riders Zero Gravity. My kids like it because it has sonic in it. Mediocre game on any platform.
Super Monkey Ball Banana Blitz. Though I think the main game plays much better with motion control then past versions and the motion control here works really well (I might even end up finishing this game at some point), I have always found the main game in this series to be incredibly frustrating and this edition is no different. I've only played a handful of the mini games and most have been pretty atrocious. Some of them have controls that are virtually indecipherable. Bizarre.
EDIT: see above - added a few more to the games we have that I haven't played yet category. Forgot about them.