Defying Gravity: Great show. Never found an audience. Interested in finding out what the story line would have been. Great cast. Veyr disappointed when the show was cancelled.
The Unusuals: A really good detective show. Quirky and fresh. Really liked the show, but I knew it was too good for tv.
Babylon 5 (full 5 season arc commitment): Without a doubt the best, fully realized Sci-Fi show to ever air. With some decent money and a commitment to air the entire scripted show (no compressed 4th season), I firmly believe people will finally get past the cheap look and fall in love with the show. If any show deserves a reboot, time, and money, it is this show above all else.
Life (the detective show with Mandy Patkin): Very fresh. Very interesting. Loved the show and how it was developing. Hated when it was cancelled. It sucks but this show, like many others suffered from too good for tv syndrome.
Enterprise: This Trek show had so much potential. I would love to see it rebooted with a clear direction and commitment to the story. I loved Baccula as Archer. Would love to see this redone.
Firefly: I'm sure this is on most people's list. I just can't accept one season for such a great show. Pull Fillon off Castle - it sucks - and get everyone back to the show.
Journey Man: This is one of the better time travel shows. I was really taken aback when it was cancelled. It seemed to be right on the bubble. It was quality tv but was still popular.
Quantum Leap: i'm I right? This show was awesome. I missed it still. I would love to see this rebooted.