Heyo, read it over and although I do not know anything about Street Fighter, if I did, I'd definitely be open to role-playing with you. I see no particular problems with it. Your grammar is good, you show a little bit of fun personality as you explain the thread and ideas. You've got clear likes and dislikes and the pictures for face claims are exciting and give me ideas, even though I have no idea who they are. You also put in a nice little caveat in the bottom about the "fireball" codeword to make sure people have read your thread and it's fairly short, so, it's not like it's something someone has to struggle through. It's a good thread for Street Fighter rp.
The only thing that I can think that might be limiting your bites is that it is very restrictive on subject but at the same time, I feel like you leave it open enough and compromise enough on how true to the character someone has to be in order to sign up. But I think a lot of it might be the first thing that people see is that this guy is looking for mainly Street Fighter fan rp and that might be limiting how many replies you get if not many people here are fans of the games.
The only suggestion I might have and it's really a 50/50 chance to improve the type of response you'll get, is to include some stories or scenarios you'd like to play out. Like quick little synopsis of the type of plot you'd like to do with these characters, either making them vague enough to include any of the characters, or about specific ones that you'd like to see together. Sometimes a story synop can help rev the engine for someone else's creativity. It might help, but I'm not sure.
But like I said, that's all I can think of. Your thread is very clear about what you want and don't want, so, I don't think that it is necessarily a lack of information or personality that is driving people away or anything.