For the past few years I've been taking a deep dive into various alternative genres, especially shoegaze and emo.
I initially became interested in that spectrum of rock music in my late teens (circa 2007-09), when I suddenly became aware of the type of music I had been hearing in Hot Topic and Vans Shoes stores- the latter of which is still an association I make to this day. I had also been hearing pop punk like Green Day and the recent wave of garage rock, especially since I had become a White Stripes fan a few years prior.
This stuff was very different from the classic rock I had grown up listening to on the car radio- the likes of Led Zeppelin, The Who, Boston, Queen, and Journey, as well as occasional prog tunes by Yes and Rush. (Full disclosure: 1960s and 1970s rock and pop is still my favorite kind of music, but I like to broaden my horizons.) I'm not entirely sure when and where I had first encountered alt rock- I had heard "Smells Like Teen Spirit" and Weird Al's "Angry White Boy Polka", but other than that, all I can figure is that it was just... around. I couldn't tell you exactly what drew me to it in the first place, either. Maybe it was just different from the blond divas and boy bands everyone else my age was listening to.