What's the Greatest Gimmicked Trick Ever?

[revelation77]

I'd have to agree with everyone saying the invisible deck. So simple it allows you to focus solely on the presentation...gotta love it.
I also like thread/loop work. Haunted so-and-so, floating this-and-that, you know the drill.
I would also kick myself if I didn't mention the Nail Writer. Such an awesome classic prop that hits audiences just as hard these days as it did 70 years ago.

 

[Randomwrath]

The first thing that immediately popped into my head when I read the question was (dare I say it?) The Invisible Deck!
After thinking about it, Derren Brown's Smoke did also spring to mind. You gotta love it.

EDIT: I know you said gimmicked tricks but I have to say that gimmicks have a tendency to be made purely for the visual aspect (though not all the time). From the sound of it, what you want is something with a build up that'll blow them away and leave them talking about it for ages. Can I recommend Sybil the Trick? This is an amazing ungimmicked trick that seems so impossible in every way and has so many elements that it's nearly a routine by itself. Just adding an opinion there.