MS:
Most people quit SOMETHING to move on to the next challenge. Some quit one job to take a better one. Historically, some quit farming to run for congress or presidency. Some quit college to enter missions. Many of our breve troops quit jobs to enter the military. Many people, such as Hitlery, Obama and dozens of others quit the senate to run for office.
All of us should be very pleased that our forefathers quit their farms, cobbler benches, accounting desks and forges...so they could join the heroes, starting at Lexington and Concord.
Arten't you at all impressed that so many cooks, welders, bankers, bakers and janitors quit their trade long enough to to fight Nazi Germany and the Empire of Japan?
The only active adult person who may not have to quit something in order to take on a new task, would be the one who is idle and doing nothing.
Your label of "quitter" seems to be a simple statement..plus being a quitter is often the mark of someone who moves to bigger and better things..