Recently I thanked a client for hiring me. I said "I know you have a lot of choices out there so I wanted to let you know that I'm really happy that you chose to hire me."
And my client said "You know, you're not the best photographer in the area. But I don't want the best. If I wanted the best, I would try to get X, Y or Z away from their employers. We hire you because you are friendly, reliable, open to criticism, willing to try anything we ask, flexible, innovative, and easy to work with. Also, you're good. Maybe not the best, but you're good. That's what we want right now."
I'm posting this for everyone who worries that they aren't the best, so no one will want them. Sometimes clients are looking for something else other than The Best.
Of course I'll always strive to get better. But being The Best isn't always what a client is looking for. Sometimes they want someone who is kind. So. Keep that in mind.