I mean, making simulations of what you're going to build is tremendously useful if you can get feedback from them that will tell you where you've gone wrong and what you can do about it.
“I auditioned for the role of an angel in the Nativity play at school. I didn't get it. I auditioned for Mary; didn't get it. So I made up the character of the sheep who sat next to Baby Jesus.”
“Sometimes, when you have someone behind the counter who's supposed to assist you and help you out, just being completely bored and uninterested - sometimes it's a little bit frustrating, you know?”