The client wanted his house painted a bright and cheery color, so I'm going to choose black.
Are you really going to go against your client's wishes and paint his house black instead of a cheery color?
I thought black looked better on the house than the color the client wanted.
Doing something that the client doesn't want is wrong. Your client paid you to paint the house the color that they want, not the color you think is best. Do the job you're paid to do and satisfy the client.
Black is my favorite color. I'm not going to do it the way they want.
You can paint your house black and that will be fine, but your client's wishes is a priority if you're going to be accepting a job from them and you should follow what they want as they will be the ones living in that house, not you. I hope you don't paint it black and make sure to do what they told you to do as you are being paid to paint their house.