OutlawTorn said
I think it's a little different when doing a 1x1 roleplay. I'm far from an expert on the subject, as I usually work with a group, but when I'm doing a 1x1, I try to work around a plot that can allow both characters a spot in the limelight. If you want to write for a main character that gets all of the development and hogs the limelight, then write a novel, instead of creating a roleplay. A roleplay is a bit different from writing another type of narrative, in that other people are involved. People want to feel included, it's a pretty basic sentiment. Aside from sheer vanity, I can't imagine why you'd want to roleplay as a main character and have underdeveloped side-characters be played out by other people.
As a disclaimer, I'm not saying it's difficult to play a non-main 'side-character', I'm just asking why you would want to. It seems as if it would be less interesting for both parties involved. I have to imagine that the only reason you would want somebody else to roleplay a sort of 'side-character' would be sheer vanity.
EDIT: That said, it was odd circumstantial coincidence that drove me to post in this thread in the first place, and I certainly don't intend to get too involved, so I'm going to bow out.