I am a huge fan of forum roleplaying and have been involved in some capacity for several years now. I have served as the GM of several moderately successful roleplays and have participated in countless many. From my experience I have found myself to be an enormous fan of civilization roleplays and similar styles were you control several characters. I think of roleplaying less as a game, and more as a story. A roleplay is several authors coming together to write a story together.