The Brothers Brick
The Brothers Brick is a site that displays amazing models, shows a few building ideas, and occasionally shows off the owner's personal models. There are seven different owners, and they run the site as a collaborative project.
The Brick Show
The Brick Show is a site that buys current Lego sets and reviews them for potential buyers. They are the strongest Lego reviewing site out there, I would say, and I would highly recommend them.
Brick Town Talk
Brick Town Talk promotes one of my favorite points in Lego, architecture. They also have building tips and sorting tips, as well. Multiple categories of buildings make finding what you like easy.
Model Building Secrets
Model Building Secrets is about just what it is: model building secrets. The owner takes photos of what he's building, shows how he builds them, and shows pictures of his Lego room and table. I recommend this site to anyone who wants help with building tips.
Brickjournal Journal
Yes, the title is intentional. The editor of the "Brickjournal", a popular Lego magazine, shares his thoughts about Lego building.
Model_Shop_Enfield
This blog is mostly devoted to updates on larger, life-size models. The blog owner lives near The Toy and Plastic Brick Museum, which is one of the largest Lego museums in the world.
These are my favorite Lego blogs. Please enjoy reading them, but please don't forget Building with the Bricks!!!