Personally, I don't see why anyone would want to RP in the forums themselves, I wouldn't want random people reading what I put out unless it was a fic or something, I don't like that anyone besides the person you want to see it can see and judge it all. It's unnerving.
Need more people to roleplay with on Steam, doing it in public on forums just don't feel right to me. I am liable to choose you or not though, I got standards.