Top Ten Favourite Physics Topics

Quantum Physics or Quantum Mechanics (whatever you want to call it) is my religion and the supreme being that I worship is the true founder of Quantum Mechanics. Max Planck. But not only Max Planck, also Hendrik Casimir as well. Reason for Hendrik: He founded my most favorited concept of it all, the Casimir effect. And the fact that I'm an atheist, it's still my religion

Hardest = Most Favorite

Integration of everything in Physics!

It always has been my favourite

Beyond human comprehension

People tend to say how quantum mechanics is supreme, but classical mechanics in my opinion is also highly relevant in our day to day life and it is possible to frame highly fascinating and creative questions in this topic

Very practical even to someone that's not too advanced in physics

Could you please explain to me why this was left out?

Seems harder if you've just completed classical mechanics; but trust me, this is one of the more fun physics courses out there :-)

String Theory, Optics, Fluid Mechaics and Thermodynamics and Nuclear Physics some of my favourite.

Max Planck is involved in the works of the 3rd law of thermodynamics. I think I read that William James Sidis also constructed the 2nd law of thermodynamics.