I would definitely prefer the world where I know about my potential future as much as possible. If I don't know something, then the chances are significantly higher that I will be screwed up about that something. If I know -- I at least partially in control my life. If I don't know -- somebody else is in control of my life, or even worse -- nobody is in control at all.

From evolution standpoint it's beneficial to have good idea about potential future. That's why evolution benefits individuals who want to know. That means that overall we should enjoy more the situation when we know what to expect.