Glad to see you back, Pilum!
As a fighting game nerd, I'll say I certainly enjoy the POTS style edits because it makes them very playable. At the same time though, from what I've seen of your work I have faith that you could make something with cool fighting mechanics that isn't that style either. I honestly think whichever you'd prefer to work on is the better option, since you're the one who'll be tinkering with them for long periods of time more than anyone else.
As for suggestions, I'll admit I mostly based mine on characters whom I know have good grab animations and potentially good "swallowing pose" animations because I figure that they would make for easier vore edits in terms of the spriting.
Morrigan (Darkstalkers) - Morrigan has several command grabs and several of her sprites seem ideal for a swallowing pose. It seems like the hardest part would be figuring out a good edit for her belly sprite? Alternatively, she's got some ...wing vore (?) potentially using her Cryptic Needle throw (the one where she stabs them with the giant point made from her wings)
http://spritedatabase.net/files/arcade/ ... iganVS.pngJuri Han (Mugen edit from Street Fighter IV) - There seems to be a pretty solid Juri edit out there, and Juri's personality seems like a great one for a vore edit. She's even got a line in the game where she threatens to eat up M. Bison "bones and all". The hardest part would be spiriting it, but I guess her ultra pose with them bent over her foot might work? In her defense, she does have a bare midriff, which I think makes the belly sprite easier.
Rainbow Mika (Street Fighter Alpha 3) - Mika's already a grab heavy character, so that part shouldn't be an issue I think. She's also ripe for AV if someone's into that, I think.
http://spritedatabase.net/files/arcade/ ... a_SFA3.pngLess serious suggestions:
Chun-Li (she seems to be popular and well-recognized -- for various good reasons! -- but she's got very few throws so it seems like getting her to work as a vore edit would be wonky.
Vice & Mature (King of Fighters) -- Both of them are servants of Orochi with a sort of snake-y theme and several grabs. I personally think they'd be great, but uh...they're not super well-known outside of fighting game fans.
Anyway, that's my two cents (or ten). I'm sure other people have better suggestions, but I figured I'd provide a few based on personal preference and relative ease of sprite editing.