One of my criteria is humor (even unintentional). I am a big fan of those who can poke fun at their day to day lives and the oddities of modern life. Given that I have a writing style that is stiff, formal, and pedantic - you might say I enjoy reading the opposite of what I write. {*grin*}
Another criteria is decent writing skills. By that I mean that sentences are well formed, nouns are used appropriately, and verbs exist. I am old enough not to enjoy blogs written in the style of texts or matchbook stenography school adds. I.e., if u cn rd ths, u cn mk $.
Yet another criteria is true geekiness or nerdiness. Given I have spent most of my adult career involved with science, technology and software development, I have a deep fondness for most things geek. I am not, however, a big fan of "gadget of the day" blogs. I have entirely too many gadgets already. I would like to see the development of a master gadget - one the size of a modern cell phone with a pop-out full size keyboard, an IMAX sized holographic screen, the computing power of a supercomputer, and 3 days of battery life. Oh, and it should weigh little and cost less. Got one for me? {*grin*}
A final criteria is regularity. I like a blog to have at least a couple of entries per week. Otherwise I tend to loose my understanding of the style and skills of the author. That continuity is critical for my enjoyment of most blogs, since they build on a sense of history and shared disclosure of experience.
I have been reading and following blogs since they first came of age, but until this beast have resisted the temptation to have a public non-technical blog. Now you get to suffer for my lack of will power! The list of blogs I follow and/or read is constantly changing. When I find a blog that I like, I usually then investigate the blogs the author follows. My investigation is somewhat trivial, consisting of reading the last three posts and then making a yea or nay decision to follow or add to my reader list. Any time the posts from any blog seem to be less interesting over a week or so, it then gets pruned from my reading list.
How do you chose the blogs you follow/read?