Physics also combines with other disciplines. Applied math uses equations to predict what will happen in real-life systems. It always amazed me that equations can describe what happens in the real world. There are many other areas where physics combines other subjects such as biophysics, chemical physics, and geophysics. My own specialty is the branch of chemical physics that uses quantum mechanics to describe how atoms and molecules behave.
Physicists are curious about why the universe works the way it does.
A good physicist likes to ask questions and look for answers. A willingness to study new material and learn math is important too. One reason I love theoretical physics so much is that I thoroughly enjoy doing math. Of course, when a student is just starting out, no one expects her to already have the skills to go into a lab or do advanced math. These are all learned, starting in school.