I basically grew up in the time just after TOS aired (I was only 3 in 1967 so I wasn't watching then, and I barely remember the series being on first run TV at all). However, I do remember a number of TV pilots that Roddenberry created after Star Trek, that unfortunately were never picked up by the networks as regular series. I'm talking about made-for-TV-movies like Genesis II, Strange New World and Planet Earth (which were all attempts to boot up a series set in the same post apocalyptic future), as well as The Questor Tapes, and Spectre (a really weird supernatural series I didn't know about until recently). It's interesting to look at those shows now and see the familiar face of Majel Barrett in nearly all of them. She also had a small role in the movie Westworld, one of my favorite SF films of the 70s.