I just felt like adding my pennyworth into this conversation. The truth is that when Babylon 5 first came out I felt like it was an underdone show, poor sets and panto acting but I came to the show in Season 4 and quicky rewatched all the show from Season 4 on. Once you get to love Londo and G'Kar as well as get to enjoy Garibaldi falling out with Sheridan, well you are taken with it.
Shame the final season was so hit and miss.
I always found the 'war room' with its cardboard map pretending to be screens and the sense the walls could fall down at any moment annoying, but take a look at the interrogation episodes with Sheridan and Garibaldi realising he has betrayed his friend and can't kill Bester no much how he wants to... Or at Londo giving in and being fitted with his 'keeper'. How could anyone doubt the quality of some of the ingredients even if the whole was sometimes pompous and cheap.
My favorite sci-fi series of all time. The pilot movie almost scared me off and the first season was rough in spots but it just kept getting better. For myself it was worth every minute.