Among the many branches of science in which I enjoy dabbling, is evolutionary biology. To me this means the subset of biology that deals with how things got the way they are, why existing features might have had an advantage over cousins on the tree of life, and how many bizarre and messed up things in nature can be explained by short sighted search for slightly higher ground.
I also enjoy the occasional forary into debunking creationists. One of my favorites is this one from The Abstract factory.