I'd say Babylon 5, excellent story arc that was more or less planned out from the beginning and a great cast of characetrs (plus the ships are quite good too).
I'd also recommend Doctor Who, but only if you don't mind a sci-fi series that doesn't take it self too seriously. In that respect it's closer to Buffy. It's about a time travelling alien called the Doctor and his (usually) female companion who go about fighting evil. The stories vary from not so serious to very serious.
I'd also recommend Doctor Who, but only if you don't mind a sci-fi series that doesn't take it self too seriously. In that respect it's closer to Buffy. It's about a time travelling alien called the Doctor and his (usually) female companion who go about fighting evil. The stories vary from not so serious to very serious.