I've actually watched quite a bit of the first season of Babylon 5 again (I've seen the first 16 episodes now) and here are some thoughts to add on my previous post. Michael O'Hare who I dismissed as a cardboard type character and actor has grown on me hugely, I now find that I'm very fond of him and he's very good in the role. Talia Winters what can I say
But the most intriguing is the relationship between Londo and G'Kar. My preference and allegiance has constantly shifted between the two and they're great characters in their own right and I can never decide who's right and who's wrong. I think the writers have done a great job here in leaving this in the first season as an open-ended question. The worst actor in the series though has to be Jerry Doyle, but even then I really like his character.