I suspect that people's reasons for liking TREK change and evolve over time. I'd like to say that my seven-year-old self got hooked on STAR TREK because of its sophisticated topical commentary and progressive vision of the future, but let's be honest . . . I was in it for the monsters and spaceships.
Nowadays, of course, STAR TREK has been a part of my life for so long that I can't imagine not being a Trekkie . . . .