Self-determination Theory distinguishes between two different kinds of motivation: intrinsic and extrinsic motivation.
Individuals that are intrinsically motivated to carry out a task do so because of the enjoyment or fulfillment that is, in their perception, inherent to the task.
The most important supporting factors for intrinsic motivation are perceived autonomy and competence. Both must be present for intrinsic motivation to thrive.
Facilitators for perceived competence are, for example, optimal challenges, positive performance feedback, and freedom from demeaning evaluations.
The sustainability of engaging in an activity, productivity, and the well-being of individuals are associated with motivations that are more intrinsic.Self-determination Theory: Understanding Human Motivation for Fun and Profit
Flow states are the pinnacle of intrinsic motivation, where somebody wants to do something for themselves, for the sake of doing it and doing it well.Craft, Flow and Cognitive Styles