I can't find the quote easily (it's somewhere in God, No!), but Penn Jillette has said that one aspect of magic tricks is the magician putting in more work to set them up than anyone sane would expect.
I'm moderately sure that he's overestimating how clearly the vast majority of people think about what's needed to make a magic trick work.
His partner Teller says the same thing here:
...Make the secret a lot more trouble than the trick seems worth. You will be fooled by a trick if it involves more time, money and practice than you (or any other sane onlooker) would be willing to invest. My partner, Penn, and I once produced 500 live cockroaches from a top hat on the desk of talk-show host David Letterman. To prepare this took weeks. We hired an entomologist who provided slow-moving, camera-friendly cockroaches (the kind from under your stove don't hang around for close-ups) and taught us to pi
Here's the new thread for posting quotes, with the usual rules: