Star Trek TNG: truly epic and a great tribute to the series, its history, and its characters. By
far the best ending to a ST series.
Homicide: the last season of this excellent crime drama had been pretty lackluster, but I love how the ending TV movie brought
all of the characters back - even, in the very last scene, the ones you
really didn't expect.
BSG: obviously it divided opinion very strongly, but I loved it. Personally I thought the characters deserved a peaceful ending after all they'd been through, and the mystical aspects were fully in line with the series.
Cowboy Bebop: pretty depressing, but I really couldn't imagine a happy ending for Spike.
Kim Possible: put a huge smile on my face the whole way through, as well a few happy tears. GO RON!!!
Avatar: the epic ending we were all waiting for, while still keeping to the series strengths (small character moments, humour). The last scenes were very moving I thought.
Quantum Leap: I know many don't like it, but I really do. Even Sam wants to go back home, he shows his selflessness and rights a friends wrong, and Sam continues to leap.
Found most of the episode infuriatingly vague and silly, but the final scene was brilliant.
Least favourite ending was The X-Files, but that just maintained the stagnation that had set years previously, so at least its badness didn't come as an unpleasant shock.