My favorites: The Big Contrarian (http://www.bigcontrarian.com/), which has incredible essays (one of the best is on something like the third-to-last page), All of Andy Baio's blog posts and links (http://waxy.org/), Daring Fireball (http://daringfireball.net) - which I started reading before I was a Mac user, and which got me into both Apple stuff and typography, so perhaps there's a bias - and Shawn Blanc writes excellent reviews of software he loves (http://shawnblanc.net/).
What about you? Which blogs really get you going?