I don't quite know. I read random stuff on Wikipedia, and it tends to gravitate towards things I like. Interest in linguistics I think was a natural offshoot of my interest in history.
The closest thing I can remember to the moment when I became interested in linguistics was when I searched up what the hardest language to learn was. A person on Yahoo answers replied Basque, because it's unrelated to any other language in the world. I then started reading about it, and even did a speech for French class about it.
Duke Kuri Kabanov of Knoll
Chief Herald of the Nollandish College of Arms