Blogging with a theme

after my last post I went and organized my bookmarks in my "blogs" folder. I created sub-folders and it really drove home that the blogs I like to read, apart from "Friend's blog" have a main theme. I have 29 blogs marked, most of which I follow pretty regularly and only 4 into the miscellaneous folder.
I now have:
Book Blogs
Food blogs
Friend's blogs
Other places blogs
Art blogs
Miscellaneous blogs

Of course this made me realize that my blog would not fit into any of those categories. I am all over the place and have no theme.

I wonder if I should blog with a theme?
Don't worry I am not expecting an answer. I am just wondering "out loud".