Just finished watching the whole series, or should that be serial?

The quality is not very consistent. Some of the episodes are great, some are ridiculously bad. It's hard to rate because of the number of both good & bad episodes is about equal (if you skip the first season). So much heart-to-heart episode/season-filler. But American audiences seem to really enjoy heart-to-heart scenes, for some reason.

It's a bit too similar to your average Star Trek spin-off. Military sci-fi seems to be the only type of sci-fi Americans feel comfortable doing, like Stargate.

A lot of the Alien cultures tended to be a mixture between Native American & Japanese, which is also to be expected of an American show.

Garibaldi & Londo were the best characters. Peter Jurasik is the best actor. Totally believable.

Back in the 90s B5 stood out a lot better, being a serial, but nowadays absolutely every modern American show for the passed 20 years has been a serial. Personally, I really dislike serials (I prefer series). Another hang-up of mine is the dreadful picture & sound quality that absolutely every American show suffers from pre-/(& sometimes even)post-HD.

If it comes down to B5 vs. all the Star Treks & Stargates, then B5 might snag first place (or second only to the original Star Trek). Like all sci-fis, it can't compete with space-race era sci-fi shows. The 50s & 60s were the golden age.