Farscape is a must see if you are a scifi fan, one of the few series that gets an ending thanks to all the fans when they tried to close down the production.
Babylon 5 is one of the few series that actually got a thread (plot) that you can follow, a bit retro, but good story ,good actors.And it gets a ending too :)
If u haven´t seen them yet I envy you. All those hours with sickleave from work and coffe cuz u cant stop .. one more ,one more ,,, just one more : ))