The important thing to do when you are considering following, is to check out the whole blog. It's OK to mark a particular post as a favorite - just use the appropriate tool to do so (I have taken to using Pinterest for more visual content). If you find that the blog offers content you would want to read often, then by all means, follow it.
I have since gone back in and really examined who I have followed. I even went as far as being selective about who I follow by email, who I follow on Google Reader, and who I follow through GFC, Linky, or Networked Blogs. The priority posts, I usually have sent by email so that I don't miss anything.
So, do the amount of followers you have matter to you? Do you care about how they follow? What are your thoughts?
Personnally, I like to see my followers number go up, but I am not real pushy about having someone follow. I know that with the GFC followers widget being pulled from non-Blogger sites, that this hurt a lot of bloggers. Fortunatley, I am on Blogger, so I still have that tool. In addition to GFC / Google+, I have widgets for Linky and Networked blogs. I also have an RSS and email options. Other options my readers have are Pinterest, Twitter, and Facebook. My followers are spread out among the many widgets. Some choose to follow in multiple ways. That is great! It really doesn't matter to me how a person follows. I think what matters to me is knowing that someone enjoys my content or gains something from my content that they choose to follow my blog. I feel as if I am contributing something to my readers and the book blogging world!