While Moraxian is a serious roleplay character who has been involved in several serious storylines, the purpose of roleplay is enjoyment.
People roleplay for the same reason they go skiing, watch hockey games, or do whatever.
It is entertainment and it should be fun. Every so often, with Morax, the opportunity for humor comes up. The reason it can is because when I play Morax, I play him as he usually is. If those around him begin to do silly, strange, or even incomprehensible things, he will try to maintain his dignity, and will treat the situation with a completely straight face. This sets Morax up to be a wonderful foil for a comedic storyline, as he is almost the perfect straight man.