Ring 7: Primary fear is of pain and deprivation. Life's purpose is to avoid both pain and deprivation, to seek, to enjoy, to explore, etc.
Ring 8: Primary fear is of being controlled. Life's purpose is to be in charge, to be on top of things, to be the force of order.
I am ESTP 7w8.
One of my best friends is ENTP 8w7.
We are VERY similar.
BUT - when push comes to shove, I'm a fun-loving person who has their shit together and makes things happen, and he is a very motivated person who also happens to have a bit of a wild streak.
We have THE SAME "innate motivations," but my primary motivation is his secondary, and vice versa.
SO - you might be a 7, 8, 7w8, or 8w7.
Wadda' think so far?
-Alex