In 2002 I was not a gamer what so ever. Played a lot as a kid, Nintendo, Sega, etc. But not in my teen years.
So I'm over at a buddies house and I find out my folks can't come get me (30min away) for a while, like 7 hours. I tell my buddy and he says "Well man, you can come over to my dude's house and play Halo if you want, I was going over there once you left since I know you don't game."
"What's Halo?" ... I get there and it's a straight up 6 vs 6 LAN party. I had never seen anything like it. Within minutes I was hooked. I ended up staying the night for 2 nights just to play more. I was AWFUL I mean I really sucked but I just loved it. One of my favorite teenage memories was that week.
I started doing odd jobs around the neighborhood to raise money to buy my own Xbox, so I get one, get Halo, I fire it up... "Campaign" ... "What the hell is this?" ... Now maybe I wasn't a gamer in my teens but make no mistake I was still a NERD. Comics, D&D, Sci-Fi movies you name it. So, when I found out there was a story, and characters, and LORE. Wow...
Those 2 moments made me love Halo. And I always will.