Well, the telepath plot is a bit drippy, but it has two of my favorite subplots ever: Londo's ascendent/decent into becoming Emperor, and the simple fact that it is easy to get everyone to work together when there is a huge threat to face or a big problem to deal with. It is a lot harder to get people to work together when all that stuff is taken away.
I liked that the founding of the ISA required a lot of struggle, pain, and underhanded political dealings and generally hard work. It felt nice and realistic. Plus, it has the final episode - Sleeping in the Light - which is easily one of the most heart wrenching episodes of TV I've ever seen.
All in all, it's a whole lot better than that weird Oreo plot from Stargate...
Though, incidentally, I was watching Farscape as I watched Stargate (both on Netflix) and so, suddenly, the characters on Farscape were in my Stargate! It was very very peculiar.
...and Farscape was already weird enough.
AND AWESOME, BY THE WAY.