Geez, if I were your parents, I'd have gotten <i>real nervous</i> when you started showing an interest in nuclear physics!
No, I think you're just an exceptionally curious guy, with a strong desire to understand the world and the way things work. You latch into an area of interest, absorb it to the extent that you're basically satisfied with your knowledge of it, and then you move to the next thing to explore. This is the mark of an intelligent, inquisitive person, out to discover stuff.