Super Mario Galaxy 2. It expanded upon the original and fixed some of the very minor problems.

I'm thinking of replaying Super Mario Galaxy 2, I replayed the first one a few months ago

I think Super Smash Bros. Brawl, Mario Kart Wii, Metroid Prime 3, Skyward Sword, and Excitebots were the best IMO. The other ones you guys named are cool, too, but these took up most of my time.

I haven't played many wii games (mostly Just Dance) but from what I've played, I really like Fragile Dreams. It has a lot downsides and it's often loved or hated by people but I honestly loved the game.
I guess it's just because I'm a sensitive person or something (and the fact that I'm a music major and the music really got to me). The atmosphere was amazingly set in stone and the silence only added more to it. The simple yet melancholy music playing in the background of cutscenes just choked me up. I bought the album so fast you wouldn't believe it.

Gaming perfection. Even got the pre-order bonuses (t-shirt and poster).

As good as Super Mario Galaxy 2 and The Legend of Zelda: Skyward Sword were, I can't not say Xenoblade Chronicles.
Such an amazing game.

Pandora's Tower. Waaaaaaaaaay preferred that to any of the Wii JRPGs (aside from Chocobo Dungeon, anyways)

They ran out of posters so they gave me, a twelve year old, an XL t-shirt. I still don't fit into it.

Dead Space is definetly up there as one of the best and it's easily the best light gun game ever

That happened to me with the t-shirt as well. Its like, the only size they had was XL! I was suprised I got the poster, since I assumed it was exclusive to Amazon's pre-order, but hey I didn't complain.

I like Fragile Dreams too, it had some problems but it also had a great style. I like how you're chasing the white haired girl throughout the game. I felt like Alice in Wonderland. I also thought all the melodrama was super funny. The game was a little on the short side though.

Super Smash Brothers Brawl for sure.

scareface...

I can't decide between the Mario Galaxy games, I love them both.

Skyward Sword is another must buy and my personal favourite of this generation of games.

Skyward Sword.

Mario Galaxy easy. Mario Galaxy 2 is technically better, but Galaxy 1 was the one that blew my mind. It was just so unique and magical.

Seriously, though, Xenoblade is overrated.

Am I the only one who loves Mad World that much?

Are you kidding me, I love the game despite me not completing it yet. I should get back to it. On topic, I really like Mario Galaxy though.

Donkey Kong Country Returns