all of the above responses mirror my own thoughts. here are some other questions to ask yourself that may help you decide. When you were a child, did you take your toys apart to either figure out how they work or in the case of broken toys, how to fix them? Now that you are an adolecent, do you look foreward to buying a new car or do you look foreward to buying a junker that you can rebuild and/or modify? what sort of hobbies do you have? do you build RC models (airplanes/boats/cars etc.)? Model Rockets? or do you spend your time doing something else. all of these things give you a clue as to your talents in this area. I have to admit that even though I am making more money than I ever have in my life, I'd almost do what I do for free because I enjoy it so much (nobody tell my boss that... ok?). People talk about how cutting edge Electrical or Software engineering is, but they still need a mechanical person to design and build the hardware. Mechanical design will never go away, and depending on the dicipline, can be pretty cutting edge. while I understand the earlier response about majoring in physics, I'd recommend that if engineering is really what you want to do, I'd major in that instead of physics. engineering is about applied physics and as such is alot less abstract than a true physics curriculum.
good luck on your decision, whichever way you decide to go.