I'm a collector and I find myself visiting CardCutz on a weekly basis just looking for something new and interesting.
The number one thing I look for in a deck is interesting court cards. I want something there that I haven't seen before. If the court cards are unique, whether it's the colour palette or the artwork, I'm probably going to buy it.
Other things that come into it are the card back, I love marked decks and numbered decks.
I'd love to see a selection of different types of cards, perhaps tarot or hanafuda cards, not sure how well they'd go but again if they're interesting I'll probably be on board.
I really want to be able to see the court cards displayed on the website, more than anything else they will tip me one way or the other, but often the images used don't tell me enough.