I'm 42, and I came to Trek through a comparatively unconventional route. It was on telly when I was a child, repeated often, but all I can remember from that time are a few colourful images (the Enterprise in a blue sky from Tomorrow is Yesterday, and being creeped out by the wavery Balok head). I saw The Motion Picture when it first premiered on UK TV, I would have been about eight years old, and I know I slept through most of it. But when I was eleven or twelve, I saw The Wrath of Khan for the first time. It would have been 1984, back when we bought our first VHS, and of the three videotapes we got with that machine TWOK went on one (Chisum went on the other and The Looney Looney Looney Bugs Bunny Movie went on the third). I watched and re-watched TWOK till I'd memorised it backwards...
But I really didn't grasp just how much Star Trek there was, until I started borrowing Star Trek novels from the library. My first real exposure to the universe was through Trek Lit, and I read and re-read books like Uhura's Song, The Klingon Gambit, Web of the Romulans, Ishmael, The Covenant of the Crown, Mutiny on the Enterprise, Corona, Yesterday's Son, The Tears of the Singers, The Prometheus Design, Triangle, Killing Time (the unexpurgated version), The Entropy Effect, very much The Final Reflection, and not so much Shadow Lord, all of which were released as Book Club Hardcovers, and which I devoured. That got me started collecting Trek Lit, and it's when I read the Blish novelisations of the episodes that it clicked with me that there was actually a TV series. From age 14 onwards, my pocket money went towards buying the Star Trek videos, usually on sale, and usually in no particular order, but in a couple of years, I had all 79 episodes on VHS, in production order, which I watched repeatedly to the point that the tapes were starting to degrade. I've actually nursed those tapes ever since, even if I hadn't watched the series in ten years now until I finally got the Blu-rays. Would that I still had a VHS player and the tapes were still mint, as in some ways I prefer them to the Blu-rays.
That's how I got hooked on Trek (the same thing happened with Doctor Who, a show that I discovered through the books in my library first, after spending the Tom Baker years cowering behind the sofa and not actually watching the show). By 1987 I was in love with the original series, had bought the first three movies on VHS, just seen The Voyage Home in cinema, and heard about the Next Generation, and instantly hated it out of general principle. That hate lasted as long as it took to actually watch it on TV, and it turned out to be pretty good. By this point a hobby had turned into an addiction, and I religiously bought everything I could with the Star Trek logo on, books, videos, computer games, soundtrack CDs (thankfully there weren't all that many of the latter two in the eighties and nineties). That obsession lasted all the way through TNG, DS9 and Voyager, but it was with the latter that the shine started to fade. I didn't think it was all that good. And when Enterprise came along, it was a four season long nail in the coffin. I didn't even bother buying the DVDs for the latter. I've watched my Voyager tapes twice. I love DS9, and having heard that Blu-ray is off the cards for that, I'm finally getting around to ditching the tapes for the DVDs for that series.
I tend to think of myself as a lapsed fan now. I'm happy with what I've got, but I don't really want anything new, not unless it's on sale mega cheap.