Too bad the poll didn't allow for combinations. I mainly shuffle overhand, but I occasionally riffle. I don't bridge, as I do with playing cards, because the deck is usually too thick for that. I riffle a lot more gently with Tarot cards than with standard playing cards, though; that is if I'm actually playing cards. If I'm using a playing card deck for divination, I riffle as gently as I do for Tarot.