Following Avinash's advice and checking the Visitor Loyalty section of the Analytics reports shows some interesting information about you guys. This site gets a lot of drive-by hits, mostly driven by images.google.com, but filtering those out by getting away from the heavily skewed averages tells me the following:
Loyalty: Ignore the drive-bys and concentrate on the people who visit repeatedly.
Recency: Even the repeat visitors tend to visit every day.
Length of Visit: Some of you guys spend some time reading what I write, which is nice.
So thank you all, and I hope you'll enhance this site further by taking part in the content poll I've just started.