I could probably go on all day about this, but I won't for the sake of not breaking the forums. XP (I just hope I'll actually get to improve my skill, so I can at least compete against some of my other buddies with competence - fighting games, while one of my favorite genres, are also a weak point)
Rosalina is probably the newbie who's catching my eye the most, but it makes me wonder if she's meant to be Ice Climbers-lite with her Luma mechanics (I've seen no mention of the Climbers and while their mechanics were interesting it was overly crippling if you lost your partner, so with what I do know of Rosalina, I wonder if she's to evoke a similar style...).
Besides her, Villager/Wii Fit Trainer/Greninja seem worth trying out. Though I'm not too sure how to feel where Greninja's involved... I'd probably be better off waiting to make my judgement until the actual game comes out because sometimes you never know until you DO pick them up.
I do hope to see a bit more balance, though this could be just be bias since my preferred character in Brawl (Lucas) was not one of the better ones. If nothing else, may we please not have a repeat of Meta Knight?
I'm glad that transformation characters are separate as well. Much of this is likely because I preferred playing ZS-Samus and Sheik over PS-Samus and Zelda, but you didn't have a lot going for you if you only used one side (and in the case of ZS/PS, well, you'd typically only ever HAVE one side in a no-item match).
...yes, it's pretty clear where I lie on the spectrum of Fun and Glory. Though Fun isn't bad either, I just enjoy challenge. XP