Mine! :p

Actually, having worked on collating the Skeptical Blog Anthology for the Young Australian Skeptics, I'd suggest you have a look at one of the most recent short-lists that has been gathered so far? There'll be an update later this week, which will reflect what the general public has considered to be top-blog posts from a variety of well-regarded skeptical blogs.

After thinking about this one for a while, I have to give it to Phil Plait's Bad Astronomy site, http://blogs.discovermagazine.com/badastronomy/.

Sure, it's got a lot of astronomy on it, so if you're not into that stuff, you'll have some noise to sift through to get to the skeptical pieces, but Phil has his ear to the ground on lots of different skeptical topics. When something hot is happening in Skeptical Blog Land™, you can rest assured that Phil will pick it up, and usually link to the epicenter of the discussion, wherever it's taking place.

Basically, if I could only read ONE skeptical blog, I'd read his, and I wouldn't feel like I was going to miss out on anything.

I find, while not overtly skeptical the New Humanest blog always approaches a subject with great deal for rationalism.

the ones I read regularly -

Science based medicine: http://www.sciencebasedmedicine.org/

Skepticblog: http://skepticblog.org/

JREF Swift Blog: http://www.randi.org/site/index.php/swift-blog.html