I understand what you're getting at, and perhaps I phrased things a little off. I did however mention that I tend to dislike things like gaffed cards, unless I can develop an appropriate routine to use them in. And the same would apply for a gimmick, but personally the gimmick needs to be simple. Something like invisible deck and hovercard... simple, suspense, showmanship, etc. I've performed the hovercard trick for an audience of around 60 people and incorporated some science behind things, but started everything out with an ACR before ending with it. It was a truly amazing moment with a great reaction with the audience.