How easy is your blog to use? Can the visitor move around quickly and easily between posts? Between categories, archives, and other multi-post pages with more than one web page? Can they immediately identify the About, Contact, and other key Pages which will give them more information about you and the blog?
Are the blog posts clearly identifiable from other content on the blog, such as graphics and ads. Or do the graphics and ads interfere with the post content?
When viewing multi-post pageviews, is each post title clearly defined, separated from the post above and below it? Is it obvious it is clickable, taking the visitor to the post?
Are the categories clearly defined so the visitor sees them and knows there is more content that might hold the answer if this post doesn’t? Are there only a few, specific categories, or dozens? Do they complement each other, or are each disparately different?
Is there a list of recent and/or related posts that will help them find more sources for the information they need?