This is why I asked. This is why I don't read many books.

Some forget the goal. It is easy to get caught up with the process. Some treat books like trophies as if reading them is in itself an accomplishment. In my view what is more important and more difficult is human action based on knowledge. One can spend so much time thinking and reading but never doing. 

I'm not pretending to know the proper ratio but simply reading ideas you already agree with because others say you should isn't something I would do. I've read some Mises and Rothbard but not a ton. I've read far more of those influenced by them. I believe in following your curiosity and some have more or less.

Over the years I've read books for many reasons. I remember hearing so many people hate on Ayn Rand and Atlas Shrugged that it peaked my curiosity. I wanted to know for myself. That is a key reason I often read a book. I don't like trusting others to accurately represent something. Especially people that are in opposition.