The Vorlon's were great for their utter inscrutibility. But my favorites were Marcus and Ivanova. I re-watch it regularly. I've even gotten 2 diferent roomates interested. There is just no other series creator with JMS's genius, vision or tenacity. It's so complex and still so relevant that I was even able to use it as the basis for a college level presentation which scored a perfect 4.0 just last year!