Ever played Yaris on XBLA ?

No

Then I can understand your score

9.5. This is the game that changed the face of the industry, and it will be remembered for that.

9.5

I can't really point out a con in this game, it does everything it set out to do right, and it showed us a whole new dimension of gaming. Even today, a session of Wii Sports gaming is really great and unique :)

9
+ Fun To PLay
+ Mostly Acurate Controls
+ Fun Multiplayer
+ Accessability

- Boxing is Innacurate
- Not as fun to play alone

9.5

+ First mass-implemented motion control scheme on a console that works well.
+ No other games did anything like it before
+ Shipped with the console (kinda free)
+ Accessiblity
+ Intense competition!

- Wasn't as precisely implemented as we all thought
- Art style could have been a little better.
- Boxing

ill give it 7/10 because the game works, and 9/10 because its free

It's extremely hard to give Wii Sports a score when it's a game I love but completely counterattacks with the values placed by the gaming populace.

Going by a 2006 standard, I'm going to give it a 8.9 out of 10.

Going by a post-Wii Sports Resort 2009 standard, I'm going to give it a 8.4 out of 10.

The game is non-intimidating on the surface but it has a plethora of practice modes that show off it's inter depths and sets it apart from the usual mini-game fair. To be honest, I can't say Wii Sports a mini-game compilation but rather a strong demonstration of what the Wii remote and Nunchuck can do. For that, I can appreciate this game immensely. It's also a great social game that makes the perfect ice breaker among friends of friends and family members you don't see often. Sure, it may be ugly and monotone by today's standards but it's incredible charming, entertaining and makes for experiences that go well beyond particle effects, cutscenes, shaders, and such. This, at it's core, is a game's game.

EDIT: Since this is a ranking game.  I think I'll go with a 8.7 out of 10.  Average of the first two scores rounded up.

9.0

Still the best motion controls I've every experienced. (Admittedly, I haven't played Tiger Woods 10 yet.)

Also very fun multiplayer, and a single-player challenge is there if you want it (by trying to earn all the medals).