I'm not much of a blog reader, but there are 3 blogs that I follow heavily: Tynan, Seth Godin, and Steve Pavlina. If you're looking for some good reading, you found my blog - good work. If you're looking for more than just me, check these guys out.
For those of you who don't know, Tynan is co-founder of SETT, the blogging platform I'm using now. He's also the reason I'm interested in blogging, and one of my main sources of motivation when I'm feeling unproductive. I have a few projects right now that deserve more attention than I usually give them, and reading Tynan's posts usually have the effect of making me more productive. If I had to categorize his posts, I'd say he writes about how to live life in an optimal way. I believe there is a very narrow group of people that share his philosophies, and that's who he writes for. I happen to be one of those people, so if you find yourself enjoying my blog, I'd suggest you check his out (it's way better).
Seth is a marketing genius. Besides several insightful books, he writes a blog post every single day. Pick any day, and the post he wrote is almost guaranteed to be great. I don't know how he does it so consistently, but he's definitely a great motivation. Most of his blog is about marketing in one form or another, but it is definitely meant to reach a wider audience than just marketing professionals. We are all constantly marketing ourselves to our friends, families, coworkers, strangers, and everyone in between, and the advice he gives is just as far-reaching.
To me, Steve is sort of a more intense version of Tynan. His focus is almost completely personal development, and he uses his own life for trials and tests. If he writes about a great product, it means he spent the last month or two using it daily. If he writes about diet advice, it's in the form of his own personal and ongoing experiment. He is very open and honest with what he writes about, and given some of his unconventional choices, that can be hard for some people to accept. If you have an open mind and desire to improve yourself, you'll definitely enjoy his blog.