tl;dr:“Managers light a fire under people; leaders light a fire in people.” Leaders don't have a title, they can elicit certain qualities, such as courage.
tl;dr:Pat outlines the reasons to venture into a leadership role. (1) Desire to have more impact. (2) Opportunity to build different skills (3) Interest in watching others grow (4) Desire to improve the environment (5) Act as a Role Model. And the reasons not to.
tl;dr:Engineering managers' roles tend to vary considerably. Pat analyses and outlines 5 archetypes, scoring each against 4 key skills - technical, team, process and product.