Firefly and Nowhereman were underwhelming shows at best.
I did like john doe and Jake 2.0 but they weren't really sci-fi, or extremely light on the sci0fi.
And I don't like when shows are canceled without a wrap-up to their storyline as well.
Some would love the show Dark Angel.
And some of those shows are shown on the Sci-Fi channel, including Jake 2.0 and John Doe.