I love 3D graphics programming. My favorite programming language is C++. I love to learn and create stuff on my own rather than re-use stuff that people already made. Not at all times though. In many cases I will use things that people already made because they are simply very useful and will save a lot of time.
I love to see game engines / graphics simulations that other people created. It often inspires me to continue and work even harder on my own engine.