In schwartz's values circumplex, the quadrant includes hedonism, stimulation, and self-direction.

The answer here is openness to change.
Shalom H. Schwartz is the one who developed the Theory of Basic Human Values. He there states that there are 10 basic human values that are then grouped in four higher categories which are called quadrants. The four quadrants are openness to change, self enhancement, conservation and self-transcendence. The values listed in the question, self-direction, hedonism and stimulation are part of the the openness to change quadrant with hedonism sharing the category of self-enhancement.