Well, whenever we see a playable Ridley in Smash, I just hope he has a moveset that makes sense with the character, and is balanced.
Mewtwo was the character I was planning to main more than anyone else in Melee. He played no-where near what I expected from him. Yeah the throws, Shadow ball (Why does it go all wiggly woogily though? Reference to G2's version? Why not the movie version?), and Teleport were nice, but everything else about Mewtwo was just terrible to me. Lots of short range stuff, hitting things his tail to hit things instead of having some sort of psychic equivalent is strange.
Meta Knight was the character I planned to main in Brawl. I couldn't stand how boring he plays. Tornado looks and behaves almost nothing like the games. His incredible power in his quick attacks was a little bizarre, I agree with the fast attacks but why so much power? He was also much more sluggish in the air than I thought he'd be. Not sure why they decided do make Meta Knight's cape part of his final smash and down+B (same reason for Luigi's Za Warudo?). I was really surprised to not see the charged up mini-tornado he makes by slamming his sword into the ground as his down b or side b. Down aerial doesn't do his classic Down-stab (too much referencing to link?). Meta Knight's attacks in general seemed very basic and boring compared to what he does in the Kirby games.
Of course, the idea of a character being so OP that people will complain if I play said character is a discouragement too.
Maybe it's because I was too hyped for them.
Of course we can't forget about Ganondorf being a clone of Captain Falcon twice. Really hoping he gets a new moveset this smash. I don't even care much for Ganondorf, but heck he doesn't deserve that treatment.
I just hope that when Ridley is playable, that he will be accurate to his appearances in Metroid. Considering his boss appearances in Brawl, it seems that they get the fact that he's fast (he even keeps up with the blue falcon). The worst thing you can do to a character is make them boring. Even if they are terrible, but enjoyable, many more people will play the character.
On a side note, blah Ridley thread moves so fast. And this post was longer than expected.... I just needed to get that stuff about Mewtwo and Meta Knight off my chest.