The dated visuals of TOS are what initially dissuaded me from checking the show out. DS9 and the TOS films are what warmed me up to Star Trek and allowed me to eventually plunge into the '60s show without reservation. I consider it my second favourite Trek series after DS9.

TNG remains the worst of the live-action Trek series I’ve seen. Too preachy, too much technobabble, and three seasons too many*. Of course, I say that having never watched VOY, ENT, STD, etc.

*Cut Seasons 1, 2, & 7 and you lose little of value.