Hi, pegasus! Welcome to our circle!
...Your Avatar is mildly disturbing, but that's okay I guess...
Anyways, You might join the Omniverse, and My RP (in my sig) is still recruiting, though we wont likely continue until Saturday as one of us had a surprise trip. Omniverse being a wide, friendly Epic with many genres and mine being run by me, and I think of myself as a pretty friendly guy! (Unless I'm commenting on others avatar's, apparently...)
So yeah. If you like Fantasy, theirs the Aelora subforum of the Omniverse section and their my personal RP in the 'fantasy' play-by-post section. If your more into Sci-fi theirs a few, like Somnium Aeternum, the Quest, the Onyx galaxy in the Omniverse, but I'm not really apart of those, so I couldn't say how friendly they are.
Finally, I'm afraid if by 'campaign' you meant D&D, We have a bit of a dearth of those, as far as I know. Though I encourage you to look in the 'Bulletin Boards' section of the forum in case any pop up!
Also, sorry for the wall of text, I guess theirs a lot going on here!