1. Realism. If we went to space, I can see us living in that type of society. Where gravity is made by rotating sections of ships. I love that idea, and the fact that ships don't act like they are in atmospheres, like X-Wings, or Star Trek shuttles do. They act like spaceships, with thrusters in different places to keep them steady and moving.
2. Storylines. This show actually has a good storyline. I love Star Trek, but the fact that, especially with TOS and much of TNG, they have no real storylines, it really bothers me. I understand the nature of episodic shows, but, nothing that happens in one episode seems to affect the other episodes. Picard being assimilated seems to be the first ST thing that has ramifications through the remainder of the series.
However, with Babylon 5, you have a 5 year arc where things from episode A later influences episode J which in turn influences episode R.
3. No one is as they appear to be. There are no technical bad guys or good guys. And if they are one or the other, they have moments of weakness or good intent. Delenn, a very good person, ordered the human race destroyed in a moment of raw anger. Mr. Morden, the servant of the Shadows, made sure to return the Eye to Londo Mollari because it meant something to him after destroying the raiders who stole it. Well, in the case of Mr. Morden, you can rightly claim it was to further the Shadows goals.
I have heard the Drakh probably were the closest thing to pure evil the show had, but, we must also keep in mind, that they were taught to be such. So, they probably view themselves as the heroes.
Now, with that said, I'd just like to say that if anyone has comments, or anything to say, please leave them. I won't mind them; it'll let me know I am on the right track or not. Just in-case you weren't sure how I would take it. I will welcome it.