People you don't like are pigheaded. Your friends are stubborn, or hold to their purpose.
Harry TurtledoveI learned by reading an awful lot and by writing a half a million words of stuff nobody would do anything with except wrap old fish.
Harry TurtledoveI first tried a novel when I was 14. First finished one when I was 16. First started working on stuff that had a chance of being salable in my early 20s, then didn't write much fiction at all because I was in grad school.
Harry Turtledove