While I love to encourage people to read, I won't go so far as saying it doesn't matter what you read, so long as you read. Some years ago my wife had a patient who prided himself on the fact that he read all the time, but his reading list read like a bad joke. If it wasn't really vile porn, it was things like the Turner Diaries, just foul, anti-Semitic, anti-minority, hate-filled trash. And this was all the guy read.
He was seeing her by court order for anti-social behavior, but even though he was highly intelligent, he just couldn't understand that what he reading was contributing to his mental state. Granted, this is an extreme example, but really, if you're not reading to... I don't know, improve yourself in some way, why read at all?