I watched the original and most of the spin-offs, but I just couldn’t get into StarTrek:Enterprise. I think I watched part of one episode.
NextGeneration was too PC. They would be on a trip to investigate warring planets, but would have to stop for a PC episode usually involving a malfunctioning holodeck or some such.
Voyager dragged on a bit too long.
I watched about half of Star Trek Enterprise. I just never could like the guy playing the lead. Watched all the rest although I didn’t like the lead guy in Deep Space Nine either. The rest of the cast made it watchable.