Star Trek ran when I was age 5 - 9. I saw one episode from the first year when I was 5 and it scared the crap out of me. I avoided it from then on.
Then, when I was 10, it started running in syndication on weekdays after school. Watched one show and became hooked.
Like you, I probably watched every episode at least 10 times.
My college roommate was a Trekkie. We’d come back to the dorm from our night jobs at the Pla-More Bowling Center in LaCrosse, and watch the reruns. I got hooked, had to have more, and spent a small fortune at the used book store on more Trek stories.
Introduced my then boyfriend, now spouse, to the series, and raised both our children as Trekkies. Haven’t quite gotten our grandson hooked - yet - but I’m sure we will. :-)
We’ve seen the movies, the original series, and all the spinoffs, multiple times.
I was a kid too when it ran on the tube as a weekly series. Compared to Rat Patrol and Time Tunnel I thought it was hokey as heck with all the cheezy costumes and effects. I didn’t get into it until after I had been to college (did some LDS) and the first motion picture came out, been hooked ever since.