Not much of it. I like to write stories now and then.
I think a RP-light guild would be cool. As Danth said I think full on in character RP is a bit much for most people. I do remember a guild back on live <Ascension of the Damned> that I was part of. It was pretty cool only evil aligned characters could join. People were kind of quasi in character I guess. Talked as though were members of a dark elven House, but it wasn't anything strict.
Anyways, I think you kind of need a theme for it to work, is what I'm getting at.