Babylon 5 was okay but not nearly as good as some fans believe it is (i.e. the holy grail of televised sci-fi), the only great performances were delivered by the three ambassadors, everyone else was somewhere between meh and decent.
Season 1 was dull as dirt, I don't care about bits and pieces becoming interesting after I've seen the entire story, it's still horrible, the only episodes I recommend are the Babylon 4 one and the season finale.
Seasons 2 - 4 are great but after wrapping up the shadow war and the earth alliance stuff it was back to being boring in season 5.
The movies (except for "In the Beginning") are crap, Crusade is awful, The Lost Tales should have never been told ... it really seems the Babylon 5 universe sucks except for three years, when it became interesting.
Oh, I forgot the effects, they're bad. I don't care if they were good for their time, good for their time still equals bad because cgi wasn't even close to good enough for weekly television (there's a reason Star Trek still used models), the Babylon 5 effects look cartoony and don't blend well with the live action footage.