I already ranked 'em by tiers, but let's list them one by one because I have nothing better to do on a Sunday.
16. Daisy: Have never cared about this character whatsoever, but she's here, so that's something.
15. Chrom: Not a Fire Emblem fan and have no need for a fourth Marth, but his fans got screwed over in Smash 4 so it's good that he's here now.
14. Isabelle: Don't play Animal Crossing, but Isabelle is cute enough. Her inclusion makes sense. Her moveset doesn't do much for me though. Almost feels like they couldn't come up with anything besides a tweaked Villager moveset with a few new moves.
13. Chorus Kids: I personally am not a fan of the Rhythm Heaven art style and I don't play the games, but I can't deny I'm curious how Sakurai implemented them. Rhythm Heaven is probably the most high profile Nintendo IP not represented in Smash, so it's pretty neat to see them.
12. Ken: I find Ryu boring as a character, so Ken is a chance to play with Ryu's moveset as a character I actually like. So, cool.
11. Mach Rider: Mach Rider isn't exactly an NES classic, but I'm very curious to see how they would fight in Smash as well. They have the potential for a really cool stage as well.
10. Dark Samus: I'm not the biggest fan of the Prime games, but they did a really nice job implementing Dark Samus into Smash with her animations. I would definitely be interested in playing as her over regular Samus.
9. Inkling: I don't play Splatoon, but their inclusion is so obvious and they bring a great moveset with them. I think the ink mechanic is a lot of fun and I'm looking forward to seeing characters get splat in all sorts of colors.
8. Geno: I'm conflicted on Geno. Super Mario RPG is one of my all-time favorite games, but Geno has never been one of the more notable parts to me and I find most reasons why he "should" be in Smash to be flimsy at best. That said, I think actually seeing him in Smash for real would get me pretty excited and tickle my nostalgia bone something fierce.
7. Shadow: Sonic Adventure 2 was my first real experience with the Sonic series and that's always what I remember Shadow for, barely playing any games beyond that feature him, so he would be another nostalgia pick. The memes will be great and I look forward to seeing his animations.
6. Isaac: I've only played Golden Sun fairly briefly many years ago, but Isaac's fans have been a real underdog for so long and I'd love to see them get what they want, especially if it revives the series as well. If his banner artwork is any indication, he's going to have a really cool moveset.
5. Simon Belmont: Although before I was unsure if Simon was really an iconic third party character on the level of who we have, I definitely think Castlevania made sense to be in Smash and Sakurai's implementation of him blew me away. His inclusion got me to play the Classicvania games, and while Simon is cool, they made me realize who is even cooler.
4. Richter Belmont: Rondo Of Blood is the best of the Classicvanias, and Richter mode is plenty fun in SOTN, so having him as an alternative to Simon - Simon is really the alternative since his moveset is the basis - is very welcome. Slide kick jumps will be tons of fun.
3. Ridley: The big boy. Ten years of waiting for him. I can't believe he's finally here and his design is an amazing reimagining of the character. I gave up on him after Smash 4, so seeing him here really lit a fire in me. I'm especially looking forward to playing as Meta-Ridley.
2. Banjo-Kazooie: In part due to the perceived impossibility, in part due to already being satisfied with Duck Hunt in Smash 4, in part due to most of my focus going to K. Rool, I never really seriously considered Banjo in Smash until very recently. Once K. Rool got in, I realized how much I wanted to see the bear and bird in Smash. Banjo-Kazooie is an all time favorite of mine and there will be tears when I see them back at home with Nintendo.
1. King K. Rool: The character I voted for in the ballot. Not just added to Smash, but saved from being forgotten forever by Nintendo. I spent so much time campaigning for this character that I fell in love with him in ways I didn't expect. Seeing him in Smash is the conclusion of years of hope and persistence. K. Rool is the realization of fans never giving up despite everything against them, and I can't wait to unlock him and release him onto the world.