Like most space opera/sci-fi opera of those years, the writing has periods of greatness and mediocrity. I had the whole thing on DVD at one time, including the movies (same with Stargate SG-1, Stargate Atlantis, and the earlier Star Trek movies). It isn't easy or simple, in my opinion, to get that genre to work over many years of production; if you want to avoid other cultural issues. I will say, though, taken as a whole, Babylon 5 and Stargate SG-1 were good.
"No sadder words of tongue or pen are the words: 'Might have been'." -- John Greenleaf Whittier
"Do or do not. There is no try." -- Yoda
On planet Earth, there is a try.
Indeed, in a world and life full of change, the only constant is human nature (A is A, after all :P).
We old vets need to keep in mind those who come after us.