If votes are being redone, then I'm gonna take a gander at redoing mine:
Upvote (+1):
Sami - She would make for an excellent and canonically-feasible Snake semi-clone, and while not considered the main character of the Wars series, she nonetheless does hold great importance within a currently-unrepped veteran series and would serve to provide representation for the deserving Wars franchise within Smash while also diversifying the game through another female character.
Lyn - That Lyn post from a page or two back (or maybe it was in a different thread, haha) about basing her from ZSS/Sheik sold me on her, especially as my first choice (Robin) cannot be included due to obvious lack of Awakening representation in Brawl. I'd be very interested in seeing how she'd come out if her moveset was based around a sheathed sword style with punches and kicks mixed in. Also Awakening DLC costume for alternate, please, that outfit is pretty dang awesome.
Sukapon - Half the work is already done with Sukapon, because, coming from a fighting game itself, it already has a moveset that could be easily be translated to Smash (plus there is a sprite moveset in the Sukapon support thread that was created for Super Smash Flash 2 that could be used for inspiration, as it was completed and entirely mapped out already). Also, Sukapon represents an obscure retro that has the chance to be very popular were it more well-known, and including the Japan-only Sukapon in Project M could perhaps be comparable to Marth and Roy being in Melee, and could generate hype and interest in the character. Plus, being that Sukapon's body is not as complex as most choices, while it would require a model made from scratch (as Sukapon's only appearance is as a sticker), Sukapon does not seem to be one that would require a vast amount of type to create. It's the moveset that might pose a problem, as it would probably mostly have to be from scratch as well.
Isaac - Isaac is one of the most popular choices on this poll, and for good reason, as he is popular, from a Nintendo series deserving of a character acting as playable representative, and a very unique character would much potential that was unfortunately passed over for inclusion as a playable character in Brawl. I'd love to see what the Project M team could do with him, and I have high hopes.
Vaati - A curveball choice, perhaps? To me, not so much. The Zelda franchise stands as one of the most popular and well-recognized series in Nintendo's repertoire, part of the big three along with Pokemon and the Mario series. However, while Pokemon currently holds 7 representatives and Mario, through way of the subseries, holds 6 as well (7 if you want to count Donkey Kong, as it is not technically a subseries; either way Diddy would probably not be counted or it'd be 8), Legend of Zelda sits as a mere 5 reps. A Travesty, I say! So, why Vaati? Why not Impa, Tingle, Skull Kid, Zant, Midna, etc.? For a very simple reason: At present, Zelda is repped by Link, the main protagonist of the Main Zelda games, Zelda, the secondary protagonist in most cases, and Ganondorf, the recurring, main Big Bad of the Main Zelda series. Toon Link, meanwhile, is the main protagonist of the Toon Zelda games. Vaati, however, is the main antagonist in the Four Swords games, and could be seen as the Ganondorf of the Toon series, considering that he is the main antagonist in three of the six "Child Link" games (the others either by the already-included Ganondorf or by other one-time characters; correct me on this point if I'm wrong). In this way, you have both Link's representing the two LoZ subsets, the main antagonists of both, as well as Zelda, the common element, the glue that holds the entire series together. Perhaps I didn't explain it very well, and not knowing the Zelda series as well I probably have some facts wrong, but this is why Vaati has my fifth vote at the moment, and I'd love to see how he'd be interpreted for Project M. Plus, in the absence of Avatar, Vaati gives a chance for creating somebody with magic-based attacks.
Half-Vote (+1/2)
Ridley
Bowser Jr.
Toad
Waluigi
Sothe
Micaiah
Dixie Kong
King K. Rool
Saki
Samurai Goroh
Pichu
Pokemon Trainer as a standalone character
Downvote (-1)
Dark Samus - A character that would really basically be a dark-colored clone of Samus (and is canonically within the Metroid series!) just doesn't sound very appealing to me, despite the fact that I know a lot of interesting stuff can be done with it. That being said, I wouldn't end up caring in the end all that much, I'd just prefer Dark Samus not get in before any of the above.