I think at this point saying Firefly is redundant, though I would certainly want the episodes to take place chronologically before the movie, because you know why.
I would love to see Whose Line back on the air, but, just for originality points, the real show that I'd want to see more of would be The Spectacular Spider-Man. I'm a huge fan of Spider-Man, and Spectacular Spider-Man was pretty easily the best take on the Webslinger's story that I've seen, barring the original. All of the villains were extremely slick, and the show actually made me like Tombstone, which is impressive. The second season ended off well enough, but the creators were planning on bringing in Hobgoblin, Scorpion, and possibly a guest appearance by the Fantastic Four. And now Disney is going to do their own Spider-Man show, which I really can't see as being able to live up to The Spectacular Spider-Man.
Edit: Okay, maybe not so many originality points. It appears that Calendor also has impeccable tastes in American cartoons.