Does anyone know of any good gamedev blogs out there? I'm thinking of starting one and I'm curious what people think a good blog looks like. Any help is appreciated!

We have a blog section here on the site.

A couple that stand out to me include Slayemin's journal, 'Gamedev info' by Norman Barrows, Psychology in Game Design, and Eck's journal among others.

Off site I really like Daniel Cook's Lost Garden, and the Frictional Games blog.

There's a recent discussion that's pretty relevant HERE too.