Doers execute. They come alive when tasks are complete, lists are checked, or projects are tackled. They typically have intense focus and are detailed in their efforts.
Leaders create the vision and inspire others to believe in it. You can't help but listen to, admire, and follow the Leaders. Without Leaders, we would be spinning in a hamster wheel with no real vision.
Lovers are relationship-builders. Believing that we're stronger together, they thrive in harmony and work hard to manage relationships and build consensus.
Learners are the researchers. These engineer types love learning and meticulously understanding the nuances of a problem.