I hardly read blogs... because they are a mess. Bad design aside (particularly Blogspot blogs, the design only serves to make reading hard), their thoughts are so disorganized I don't know what they are saying. Not all blogs are like this... but there are enough to turn me off.
Also those so called blogs by various companies on the web are just nothing but news of them. News portal + blog = redundant.
I will never blog, although once in a while I write stuffs down on various places to prevent me from forgetting something.