Fiction vs literature

I am currently reading a fun, light feel good book and listening to a book that is a lot heavier. The longer I have been out of college the more I notice that books really affect my moods. With reading two books at the same time I notice it all the more. Some times I  feel like I am wasting all that I learned by reading the feel good books but since they keep me from slipping into a depression I go with it. I will admit that I miss the conversations and the debates of the heavier books from college but there is no one to talk about them with. Just some random musings on what I read and why.