At first it was watching AvP. Meh, not great, but pretty wicked.
Then I saw the Predator movies, and I thought that the Preds were the bomb.
But one night, this year, Alien Resurrection came on, and I watched it, then Alien 3, then I watched Alien at my dad's. I got hooked onto the Aliens.
Now my older bro and I have fights about who would win all of the time.
This site did the biggest in it, though. Just looking at it, I can tell that it's been up and running for a long time. Which really says: Hey, this site on AvP has been up for a long time, which has to mean something.
So everything came together for me quickly. Thanks to Wikipedia's similar links.