My personal favorite is Babylon 5, I like the 5 year story arc, and love shows with telepaths. And I think Babylon 5 used sci-fi to remind us how harsh history is to humanity and how it can be harsh again if we don't learn those past lessons.
Farscape, B5, Buffy, Charlie Jade, Burning Zone (pilot and first few episodes only), and Strange. I'd also like to say that the recent pilot for "Being Human" was great.