Enterprise because it got the chop.
but i would have liked to see another season of Voyager, not because its the best show, but It would have been nice to see the characters readjusting to life in the alpha quadrant, rather than BOOM through the wormhole, oh here we are, roll credits!
Oh, yeah. The end of VOY sucked. There should have been a reunion scene. At the very least, would have been nice to see Adm. Paris welcome his formerly rebellious son and daughter-in-law and to hold his granddaughter. I would also like to have seen a reunion of Janeway and her dogs. It also might have been nice to see Anika reunited with her only surviving relative who isn't Borg.