In the past year I have been sticking to the rule of 7 (if I want a new deck I have to get rid of another deck in the collection as long as I keep it to 7 tarot decks). I got rid a of a dozen or so decks and oracles and I find I don't have the same urge to buy ALL the pretty decks anymore... Baby steps I guess...
Top Three (would never give these babies up)
1) Albano-Waite
2) Victorian Romantic (any edition, I own the 2nd)
3) Anna K 2nd edition
Quirky decks I love but *might* be willing to trade up for
4) Wildwood 3rd edition (trimmed and gilded)
5) Druidcraft (trimmed and gilded)
6) Zombie Tarot
Goddess Decks ( definitely keepers )
7) Dark Goddess Tarot
8) The Goddess Oracle by Amy Sophia Marashinsky
52 card Playing Card Deck ( try prying this out of my cold dead hands lol)
9) Vladislav Erko's Ukrainian Korchma Taras Bulba playing cards (beautiful Ukrainian folk costumed court cards) love love love this deck
Wish Upon a Star Tarot Deck ( doesn't exist yet...)
10) a tarot deck based on dia de los muertos and/or milagros art
I only own the nine decks that exist above