Okay, I'm blatantly biased since I worked on the FS books and magazine, but I've got to go for FARSCAPE. I respect B5, and it hit some amazing heights during the middle of its run, but I'm not sure I've even seen most of the first and fifth seasons, whereas I would've been hooked on FS even if it wasn't my job. It was wild and crazy and intense and visceral, with great characters and probably the best love story in sf tv history.
Love the id/superego analogy, btw. Which probably explains my preference as well.
The id is always a lot more exciting . . . .