What If What I Want To Blog About Is Boring?
It all depends on what you consider boring - maybe others will consider it boring enough to continue reading your blog.
You should take some time and look at all the different kinds of subjects that blogs are about. I seen blogs that talk about the most technical stuff - stuff that others would consider boring - but their blogs are very popular because people are still interested in the subject matter.
If you're starting a blog and you want to write about boring stuff then go a head and give it a try. See how it turns out and see how many visitors it attracts - you may be surprised!