I was doing some intense introspection today and thought about all the people I know of various types and came to the conclusion that subtype is a result of having an ability bottled up. An intj-t subtype for example might have their spontanious realization unappreciated or supressed causing them to report only their logical judgements and keeping their intuitive sparks hidden. An intj-n subtype however would avoid talking about the logical work he did to get to his conclusion but would talk about his/her visions freely whenever they pop up. There are certain payments that each function needs to feed on in order to keep functioning,the type of payment varies for each type. The dual has an excess of a certain type of emotional payment, that isn't useful to them, but is useful to their dual. When you emotionally get too much of something and it throws you off ballance, you can always exchange emotions with others to get back to the middle, but since our brains are matured and have low entropy within them relating to our functions, we will begin to become the type we were again by restarting the same viscious cycles that once were present. I think two creative subtype duals would be able to make each other less creative and more base, while base subtype duals would push each other to become more creative, by feeding each other appreciation.