What everyone is adapting to the occasion in many of the most recent posts {eg Will at 0514} is, of course, Theodore Sturgeon's irrefutable Law Of Science Fiction: variously rendered, but in essence

"90% of SF is crud -- because 90% of everything is crud!"

...including tv, natch.

Everyone's remaining 10% will vary:- Seeking out that 10% which works for oneself is surely the essence of the matter...