Working a creative job in a non-creative, routine way is almost impossible. Because creativity isn't something that one can always manifest at will. If they're not feeling it, it's not happening.
They don't do well in 9 to 5 jobs, or under bosses that insist on riding their ass. They're better off being their own boss.
They enjoy solitude, a lot
Creative types are highly sensitive, meaning they get easily overwhelmed at times. They enjoy long periods of time alone in order to rejuvenate themselves.
Quiet time is perfect for reflecting on the endless amount of thoughts streaming through their heads. Much of their inspiration is garnered during time alone.