I've lurked here anonymously for a number of years. Now I have an identity. I'm a person, not a number! As a kid, I was mostly into biology. I started college in that field. Later, I switched to astronomy. I should have pursued both, but focused on astrophysics and ended up with a masters. My interest is primarily motivated by wanting to understand the universe. That's why the scope of biology on the earth was too small. I'm interested in all of modern physics, really. As far as astronomy goes, I'm interested in everything outside of the Solar System.