Damn, I wrote a long reply to this last night and it got munched.

I've not seen season 4 since transmission, so I bet I'm forgetting a great deal about the Londo-G'Kar-Vir scenes: I just remember disliking the Cartagia plotline. (I think I found it too nasty - I'm a bit of a softy, really. I can't watch the Caligula bits in I, Claudius either.) So it might be I'll watch them after this gap and find I really like them. Adore both G'Kar and Vir.