Sonic, Bayonetta and Toon Link are my faves to play. Really happy Wolf is back cause I enjoyed playing him as well, and even though I'm sick of Link I'm pretty happy to see Young Link returning, as that's who I played before switching to Toon Link.
I can't wait to try out all the new characters to see if I got any new ones to add to my mains list. Piranha Plant I'm really looking forward to
There's also a lot of existing characters I want to learn how to play better like Lucina and Roy, I really like playing them but I an't very good at them lol, same with Pit and Falco, I actually used to do pretty well at those characters for BRAWL but couldn't really get the hang of them again in 4. (Though... I also hardly played 4 compared to melee and brawl. No one I knew had a damn Wii U system so I had no one to play the game with)