These are five blogs I enjoy reading the most, and without which life would be less interesting for me. I've thought long and hard about which would be in my top five, and I'm basing this purely on content, not how much I like the blogger (if they're a friend) or on how senior someone is in the field (no sycophancy). Blogs in abeyance, such as the brilliant Iconoclasm, and people who stopped blogging regularly have obviously not made the cut.
David Meadows' Rogue Classicism is my number one go-to blog, and probably that of most people interested in archaeology and Classics. I don't know how he does it, but he daily blogs all the major stories, and sends out a weekly newsletter too.
My second choice is Judith Weingarten's Zenobia - she covers strong ancient women, not just Zenobia, and since these warrior women are the subject of my next book, I love her lengthy well-researched posts.
I also enjoy the anonymous Livius' The History Blog - it has a slightly wider scope than just the ancient world, but always covers interesting stories.
The next two blogs were harder to chose, mostly because they are very specialised:
Jim Davila's PaleoJudaica covers ancient Judaism, including the Dead Sea Scrolls, archaeology, etc.
David Gill's Looting Matters covers looting - I don't agree with everything he writes, but I have a great deal of respect for his crusade (and I agree more than I disagree with him). [Update - actually I no longer recommend his blog. See here]
Two 'extra' blogs I recommend are Vicky Alvear Shecter's History With a Twist (currently concentrating on Cleopatra) and the RSS feed for Bryn Mawr Classical Review.