Would you include stuff that straddled decades, like Quantum Leap, Alien Nation, STTNG (80s-90s), Stargate SG-1, ST: Voyager, Buffy, Farscape, Earth: Final Conflict? (90s-2000s?)

Sure, if there's interest! I considered listing TNG but since Star Trek has kept on trekking, I figured that might have answered its own question.