Oh, we're talking about character changes we like? I could list a few...
: He looks so stinkin'
slick to play as, holy cow. The new Smash attacks especially look super satisfying to pull off, so I'm definitely giving this guy a go as soon as I unlock him.
: HE HAS THE SHOULDER BASH BACK AAAAAAAAAAA! ...Oh, and his new forward tilt looks good. I like how fast it looks.
: He looks like he may actually be competent this go around, which I am completely okay with. Pichu is fun.
: He actually smiles and acts more like himself now. That makes me very happy, as that's been something that's been frustrating me since Brawl.
: I like the new animations, they look really nice and help him stand out from Mario even more than he already did.
: He looks like an absolute joy to play with those fast grabs. His new Final Smash is probably my favorite one in the game right now.
: Probably the most expressive character we have right now next to Dedede. The new Final Smash really won me over, and it's safe to say I plan on playing a fair bit of DK when the game comes out.
: SHE CAN JUMP WHILE CHARGING NOW AAAAAAAA! She also has a faster roll, oh my goodness Christmas came early!
: His coat looks fuzzy. :3