Most people will tell you that tenacity is a great quality to have, especially if you're trying something challenging that takes a while to complete.
Odds are, the people you admire have shown real tenacity in achieving their goals. Anything really worth doing takes persistence, perseverance, and stubborn determination. Being a great baseball player requires real gifts, no doubt, but even the most gifted player won't make it to the big leagues without the tenacity required to make the long, hard journey up from the minors. Tenacity is the quality displayed by someone who just won't quit — who keeps trying until they reach their goal.