It is the same way with me picking clothes. There is no particular style I like, just whatever strikes me at the moment.
Some people say they only like solid colored shirts.
Well, you can asking them why they like solid-colored shirts, and then ask them why to the reason they give you for that. This feeling is very difficult to put into words and explain why, but you know it is good, so you follow that feeling. That is the feeling I use to pick clothes, books, many things. I try not to limit myself with things I have been comfortable with in the past. A friend of mine explained it well with an analogy about food.