Babylon 5 is a good one. The CGI space stuff starts out looking horrendous and doesn't get much better. Partly budget (Star Trek looked much better but wasn't as ambitious) and partly too early to benefit from improvements like Battlestar Galactica did.

When it aired where I live, it was always on fairly interchangeably with other shows. At that time it would randomly be something like Star Trek TNG or Quantum Leap or Sliders or something in that time slot, usually stuff you can watch a single episode of without worrying too much what came before - it was pretty much impossible to watch a season in order, and keep track of it (esp. as a kid!).

But Babylon 5s storytelling is MUCH more like the current status quo where you expect to watch all episodes in order. The storylines are epic, political intrigue, save the world stuff, it's extremely well written, but you'd be lost if you didn't watch in order.

If they made it today it would be incredible, highly recommend watching if you never have and you like an epic space opera!