I love just about anything that can be labelled as "Backend". I dig Java, databases, building clean APIs, distributed systems. Things of that nature.
I'm actually brushing up on my math skills right now. I used to hate math and as each day goes by now I am finding more and more beauty in math. I'm also doing a little bit of LISPing from the book How to Design Programs.
projects and hacks
The main open source project I'm working on right now is Piper which is a Java based distributed workflow engine.
I'd love to help new programmers with any questions they may have.