Battlestar Galactica-new version
I loved BSG, it's one of my top 5, but I was fine with the length and the finale. I recently started rewatching it and as I'm moving through season 3, I realize how often the plot kept getting dropped in favor of filler episodes and tedious love square stuff. Love the show, but it's clear that they wouldn't have had the steam to carry it for much longer.
My pick: Pushing Daisies. Dead Like Me was okay, but PD had more charm, more charisma, and outstanding visuals. It was a whimsical twist on crime procedurals.
It's sad that with the emphasis on Nielson ratings, a show can garner 12 Emmy nominations and get canceled that same season.