I love decks of cards with pictures of naked people and stuff on them. I sometimes search for them on ebay and pay ridiculous amounts for them. I don't even play cards.
I mainly like the illustrated ones. If they are photographic images the deck has to be really special to catch my interest. This website has a very good collection available, some of them had a bit to much going on in them for me to post here, but definately worth a look:
Check out their other sections aswell, they've got some fascinating imagery in there.
There is also a book available, which i am considering.