I'm random, you ass. (please note that I intended "ass" as a tease. If it offends you, I will gladly edit it
) But seriously, I've had RPs last on simple premises. Granted, sometimes we didn't go anywhere, but it was still fun.
I can understand making canon characters go far beyond OOC. For instance, I can understand Pan from DBGT being a bit more mature and thoughtful in an RP, but not making her personality pull a 180.