I was having a conversation with a friend of mine earlier about a bill switch Andrew Mayne put up for free. He didn't care for it and thusly fell prey to an all too common malady many magicians have. I don't like it therefore NO ONE will like it.
As magicians we tend to get so bogged down in the magic world we lose touch with the rest of the world. I know a certain CD manipulator who has won many magic awards, but yet his act can fall flat to some non-magicians. You have to be aware of the world around you and be educated about what plays for certain groups. I'm not saying be prepared to pander to everyone, but be aware of what people like and be conscious of it. Magic appeals to just about every person on the planet, (with the exception of religious nuts, skeptics, and people who got molested by birthday party magicians), but different themes and props will play better to certain kinds of people because they are familiar with them on various levels. Just because your magician buddies love your triumph routine because your Zarrow shuffle is undetectable, doesn't mean anyone else will care or notice.
And for the record, I know a convention hall full of people who would love that bill switch.