I like to do recreational math, especially math regarding dynamical systems, complexity, or puzzles. Other hobbies include using Spanish and German, analyzing movies, reading books about neuroscience, philosophizing, and listening to music.
Check out my profile on Math Stack Exchange:
Here are my five most recent blog posts:
Read other blog posts I've written on these topics:
Here's my CV, which includes a list of books I've enjoyed reading recently.
I also head a philosophy club, and all of the notes from our previous meetings can be found at this page.