i collected and played Magic: The Gathering when i was a teen. I guess that made me a nerd.
I did not become a fan of star trek until i was in my twenties when i first saw reruns of voyager. I had seen several episodes of TNG and TOS in my teens but i was not interested in them and hence i did not follow them But VOY was the show that converted me to being a star trek fan. Babylon 5 bought me to sci fi earlier before. It was a slow conversion from the mid 1990s to the early 2000s.