I love Lisp. Emacs is the best editor for Lisp and a good operating system too (sarcasm). I love deterministic theories and compilers as well I really like minimalist systems. AI is great for me, but somehow stochastic models I don't like it too much :( (modern AI is heavily based on that). I like computer architecture, physics and high abstract theories.

Lisp for the Lisp. Mathematics for the Mathematics. Art for the art.