Here is an interesting saying from one of the Desert Fathers:
Do not want things to turn out as they seem best to you, but as God pleases. Then you will be free of confusion and thankful in your prayer.— Abba Nilus in Desert Wisdom: Sayings from the Desert Fathers
I think it's interesting that the outcome of letting go of our own preferences is the freedom from confusion as well as gratitude. Perhaps that is because if we are constantly attached to our preferences we end up never being satisfied.