I'm loyal to Java (read: will choose this language over others in the general case because of my experience in it) because it's the language I, by far, have the most experience in. When I was ready for AP Computer Science, the AP test was in Java. From there, half of my classes in computer science were in Java. C was the other frequent language.

With that much immersion, when I started doing things on my own, I would naturally move toward Java because I was rather good at using its API, and writing in it flows most naturally to me.