Usually shows will stick around too long and then when they finally come to a close the last episode leaves you feeling empty, wanting more, or unsatisfied. There are very few shows that I feel have made a worthwhile finale.. but here's my favorite..
Seinfeld. Ok maybe it's not a shock to anyone but personally I thought the last episode was brilliant. They brought back almost every significant character for the trial and even some that weren't all that important.. I loved the way they were all integrated into the piece and I loved how everyone finally realized that the four of them (Jerry, Kramer, Elaine, and George) are all basically the most selfish assholes of the face of the planet.. Yet they still don't really seem to get it. even in prison at the end Jerry is cracking jokes about meaningless crap to stay true to the legacy for show about nothing.