I think anyone who claims to be a B5 fan is probably a bit on the "more mature" side--it premiered in the U.S. in January 1994 and ran for 5 years. tink and I have talked about it privately and agree that some of the Fx sucked and some of the acting was horrendous but that it had an overarching story arc made us diehard fans. For me, this was a first: in episode x, a character would make some statement that left me scratching my head, and then in episode x + 3 (or something), something would happen or someone would say something, and I'd sit straight up and yell, "Holy crap! [I]That's[/I] what so-and-so was talking about!" Further, subsequent viewings of old episodes would have me sitting straight up still again to shout, "I didn't see that the first time!"
I really do think that the love of B5 is a generational thing, because before it, I had never had a series so engage me on an intellectual level. Obviously, we've had some pretty brilliant series come down the line since then, but since B5 took this particular maidenhead of mine, I'm always going to think of it fondly. And yes, I have all of them on DVD.
It still hurts me to know that the actors of a couple of key characters have been dead for some time.