Connection, but that can come in different shapes and forms just like we connect with people for different reasons.
Originality also. If I am going to have 100 decks, which I very nearly do, I don't want 100 different versions of identical things. I need each to have a unique viewpoint and way of seeing the world. Not a fan of "clones" RS or otherwise. I like something new and innovative that will force me to see thins and life in new ways.
I DO absolutely need scenic pips though as I read mainly bt analysing the card imagery. I like artwork that appeals to me but on occasion I have found decks where I did no like the artwork and they still read well for me
I like fairly busy images as I get most of my answers from the card images, so the busier, the more detailed answers I will get.
I personally do enjoy keywords on the cards, although I don't need them, but if I find a deck that has them it's a welcome edition.
I like it when they're well printed and laminated. I've gotten decks before, more than once, where when I first got the deck gone of the cards were "glued" together and prying them apart removed sonevof the paint on the card(s). BIG pet peeve there.
That's about all I can think of. The size doesn't bother me at all as my hands are big enough, but I'm not a fan of minu decks as its too hard to see the image details. And I do prefer decks that photograph well ( some with tiny detail or metallic foil don't) as when I read for others o tend to include photos of the cards.
Band