It is in a state of Limbo that i prefer my cards.... before a performance i will open a new deck and run through the routine once... this is to insure that the cards are usable for the moves... this amount it perfect... i will not tolerate any more or any less...
I use to like them brand new when I started doing card magic. But after I got into flourishing, I then realized how a broken in deck will benefit me more in both flourishing and magic.
I like to open a deck and do a few XCM moves for a while to break them in a little but still have the new feeling of them and then perform. This is my ideal card condition since they're still brand-new but dont slide and slip all over the place.
I like mine broken in. When I open a pack I will shuffle them and spring them quite a bit and then stick them in one of my card clips overnight. When I come back they are just the way I like them. Not to stiff and not to soft. They seem to last longer too. Another upside is that they will be flat as a pancake when I take them out and they stay that way for awhile.
You just can't beat the smell of a brand new deck, I love it when you fan them for the first time, its great. I have a really old deck that I use for practise, I take it on to the streets when I know people are going to sign some cards.
I like a brand new deck the most. lets say you're going to do 8 table faro shuffles, it gets very difficult if you're not using a new deck so I like to use them as well for practice ass for shows
Love 'em broken in, just not too much. Im not a big fan of running my routine with a freshly opened pack of cards....just a little use and theyre ready to roll for me.