The highlights have been John Baez commenting on one page how beautiful the images were, and Jugu Abraham (Indian movie critic) thanking me for linking to pages on his site. Am still considering getting rid of comments though—even though it's handled automatically, they're about 99.99% spam.
One thing I learned is that my pages on the most obscure subjects get the most hits! Two in particular are super-obscure and get hits almost every day. I guess there's no other pages on the web about those topics. That maybe seems obvious, but was surprising. It's hard not to assume a piece of writing has to be on a popular topic for someone to want to read it.
[0] http://amasci.com/faq.html#hits the whole page is a great read, as is the whole site. So much great stuff.