There were some B5 episodes that I did enjoy. It often got long-windedly speechifying, but there were arcs (such as the Babylon 4 saga) that I honestly liked.
I don't think I've ever seen a full episode of Lexx
, although I did see some previews and it did look like porn to me. (I just looked it up on Wiki and now it *really* looks like porn.) So I can't say I miss it.