I think you what you mean by mix the cards in your hands is to lace the cards? This is where you shuffle from hand to hand, using your thumb to draw down from one hand to the next? This is how I shuffle.
I also "spin" the cards for reversals - I've not met anyone else who shuffles like I do. To spin the deck, I palm the top and bottom and twist in opposite directions, so they fan in 360 degrees, and then I place the deck on a solid surface and let them all fall together again.
I will lace and spin my deck several times over before splitting the deck to choose my cards. I almost never deal from the top (unless instructed to in the moment), but it's my habit to split the deck to chose each card for the spread.
Lace spin split, lace split, lace spin split... like that. I almost NEVER riffle shuffle. Very rarely... very very rarely. Bad for your decks, I think.
Yeah, I've gotta be different. But it works for me and I like it....