Didn't you bring up winning or losing...?
And i have to disagree with you disagreement, magic in the spectators hands is almost always better.
better being undefined and very general but still
OK, now I have to ask what PROOF? Are you ASSUMING that spectator's react better to magic done in their hands, or did you bring some sort of noise meter to gauge db levels per effect that you perform?
Look ALLLL the way back to DB: Street Magic. Remember when he bit the coin in half? Did you SEE those reactions? The effect didn't happen in the spectator's hands.
If you do an ACR, you aren't getting any more of a reaction by having THEM "put" the card back in the deck. The end result is that they are still amazed just the same.
There ARE effects I perform that require a spectator to hold on to a card, or money, or a ring. And when that happens, the end result is the same: they are amazed. There are also effects I perform that require me to hold everything, manipulate everything, etc...the end result is the same: they are amazed.
The reality of it is, people will go back and tell their friends what kind of awesome show they witnessed, but usually will not be able to recall EXACTLY what happened, unless they are telling someone within 30 min from when it happened.
It's the same reason why as a police officer/investigator, it is best to get on scene as fast as possible to interview witness as fast as possible...