I had both the AMT Enterprise and Klingon Battle Cruiser models, and a Mego Spock figure. As for books, I had (still have somewhere) The Making of Star Trek, David Gerrold's Tribbles book, and The Star Trek Compendium. I also would buy every edition of Starlog that had any Trek-related articles or interviews in it.
I have only made it to one con, a small one back in the early 90's. James Doohan was the featured guest, and I'm glad that I got to see him in person, as Scotty was always one of my favorite characters, and probably the one that I most wanted to be like.
When I was young, I was into ham radio, electronics, model rocketry, early 8-bit video games and computers, and loved NASA and anything to do with space exploration, so I guess I fit the Trek fan profile pretty well.