wonderful show. it's one of my earliest memories (the rock monster/alien from "The Savage Curtain") and I had to be about three at the time. that alien scared the hell out of me, and I was relieved to see it change back to a rock form every so often. I didn't remember the entire episode, but the alien sure stood out.
suffice it to say, ST has been a large part of my life for a long time. for the longest time there was nothing else to watch for sci-fi fans. it was almost 10 years before Space:1999 showed up, and it was not quite ST. it took Star Wars to get Paramount to gear up for a brand new set of movies, about half of which are really good.
and then the sequels and prequels started, followed by the needless remake of the show. and no, I try not to add "TOS" on it, since it's just Star Trek.
I'm glad it's been around most of my life!