Cogitative Psychology is an interesting subject. How we see, hear, listen, and generally perceive things shape our reaction to it. I think there is a lot to learn here in terms of human computer interaction. Such simple things as the positioning of the buttons in this very blog I am writing right now is effected on preconceived notions, personal experiences and "common sense".
Worth thinking about, just how things are placed, and shaped. When they aren't, you can experience difficulties to perform things. On a subconscious level, you start to disapprove of the tool you are using, because it is not like the other ones.