1Eleven
Thanks for warning me off the newer decks, Tag. That is exactly why I mentioned traditionally accurate with maybe playing card inserts which aren't too overtly done (the Enchanted Lenormand would be a perfect example) but with no red-eyed or long fork tongued snakes which look like they could come alive. It is imperative that it be sitter-friendly too.
What kind of people are you reading for?
Negative is what gets most peoples attention, unfortunately. There's a reason the news shows are so popular.
Btw, I don't see the Snake as a very negative card.