Apart the obvious of liking good artwork, I also like a good typographical deck, and am a sucker for four-colour decks.
These are listed in reverse order with my latest acquisition first.
Carta De Flor
hanafuda deck
hanafuda deck
hanafuda deck
Nishiki
hanafuda deck
hanafuda deck
hanafuda deck
Eiko
hanafuda deck
hanafuda deck
hanafuda deck