My most wanted stages:
-Peach's Castle 64: My favorite stage that is currently possible but not in Project M. This stage is amazing... add it!!!
-Mute City: This is my favorite stage not in Project M, but currently, it's not possible. Once Mewtwo2000 or whoever else is trying to recreate it is finished, it should 100% be added (assuming it functions properly).
-Kongo Jungle (Melee): I haven't seen a great remake of this stage, but if one was made, I would love to add it. Maybe edit out the barrel and the rock, and maybe the third and highest deck.
-Poké Floats: I dunno, but I find it to be a fun stage.
-Online Practice Stage: I guess I just love the layout!!!
-SSE Stadium: I know it's not on the poll, but it would be a super fun stage to play as, although, I guess with PS2 not transforming and the two of these stages basically being the same I don't really mind this exclusion.
-Battlefield 64: Also not on the poll, I think it would be a great addition if it was a larger version of Brawl's Battlefield. Plus, it's a cool throwback.
-(unofficial) Project M - The Summit (by Hope4NeWDaY): This is an incredible modded stage. It replaces The Summit (placing the original stage in the background, much like Project M's official version of Green Hill Zone), and it makes a basic flat (icy) bottom with two icy platforms above it that both go up and down. It's a really great stage to play on. I think given the quality, this should be upgraded from unofficial to official stage. This is an incredible stage.
Other stages I wouldn't mind:
-Termania, Great Bay: Only if there was a really good version of it. While the layout is wacky, it is at least interesting.
-Mushroom Kingdom II (Melee): Eh, I have a weird soft spot for this stage.
-Green Greens (Melee SD Remix version): Cool layout. I think it could work nicely in Project M.