Here's a list of blogs I check every few days or so.
The Goose is deeper; xkcd is published more often.
It's customary to have a blog-roll on your own blog but I never got around to it, plus my list is somewhat volatile.
As a subscriber to The Economist I get to read their blog posts, non-subscribers are not so fortunate. The blogs Gene Expression, West Hunter and The Reference Frame combine fierce intelligence with blistering invective: what's not to like? A North-American academic compared Steve Sailer's blog to a gift which keeps on giving (if you can ignore his obsession with strange American sports).