Hmm, there are some interesting things here. I have been looking for a really strong piece of mentalism to close my show with.
I have toyed with impossible card predictions, newspaper predictions, serial number predictions, locked boxes with predictions inside etc, but I have found that when you are predicting
something of a personal nature to a spectator, it hits harder.
Stigmata works very well for this, as does Emotional Intelligence (although I prefer Stigmata).
So a card prediction is okay and even hard hitting, but a name prediction just destroys it because you are getting people to invest emotionally in what you are doing.
Now I just have to figure out if it works better to have a prediction in the sealed box (like the master prediction system) or not.