Certainly all of these things are crucial for a writer. You can't know how things will pan out. I discuss on my Facebook Author page tonight the fact these "boring traits" have paid dividends for Andy and Jamie Murray, as they both finish the year as world number one in the mens' singles and doubles tennis. But there is a lot in common with writing here.
Just as they have to practice and practice and practice, so do writers. Just as they have had and will continue to have to accept losses as part of the overall game, writers need to accept rejections in a similar manner. What really matters is can you learn from these things? The overall aim is to never give up and always seek to improve what you write (improvements are always possible!).
So onward and upwards for us all. Likewise for our characters. The "boring traits" really will bring out the best in them. Frodo in The Lord of the Rings is a classic example of persistence, hard work, never giving up and so on. The story wouldn't be the story without that. He wouldn't be the heroic hobbit without them either.