I typically work more with tarot decks than oracle cards, but I own a few oracles. I use the "Wisdom of the Hidden Realms," "Druid Animal Oracle" and the "Heart of Faerie" oracle, among others, but I think I like the "Hidden Realms" and "Animal Oracle" best. The "Animal Oracle" book is awesome, it's very informative and plus, the artwork on the cards is beautiful. The "Hidden Realms" is an unusual character-based (for lack of a better term) deck, I feel like it's very positive and uplifting; I tend to use it in readings with people who aren't comfortable around tarot decks, since its imagery is largely neutral, as opposed to using a deck for them that has like vampires, or werewolves (which are fine, of course, in many cases) or dark, muddled subjects in the artwork (which I like, personally, like for instance in the Archeon Tarot deck).