Art is like masturbation. It is selfish and introverted and done for you and you alone. Design is like sex.
There is someone else involved, their needs are just as important as your own, and if everything goes right, both parties are happy in the end.
You do your best work if you do a job that makes you happy.
You don't become great by trying to be great. You become great by wanting to do something, and then doing it so hard that you become great in the process.