Physics is the the study of forces and energy in nature.
There are many branches of Physics.
Of particular interest to me are:
Quantum Mechanics
Vibration and Wave Mechanics
Electricity and Magnetism
Gravitation and Relativity
Particle Physics
Nuclear Physics
Mechanics
Thermodynamics
Theory of Wire
I'm also very interested to see how CERN explains recent findings about faster-than-light neutrinos and the Higgs particles. If anything moving faster than light can be detected, it blows a gaping hole in my perpendicular universe hypothesis.