I have and primarily use Oracle decks. The ones I have are:
Medicine CardsSacred Path CardsThose are decks that were used by my former Psychologist as an option for deep evaluation of what you see. He has a PhD in several forms of therapy and is well trained in spiritual healing. The reading I got from them was accurate and provided much guidance for the nexy few months of treatment (not something I would reccomend from everyone or for everyone, just people specially trained in the use of oracles in psychological healing)
Spirit of the WheelThat deck is the one I use most often. While the messages are based in spiritual thoughts and how the spirit connects to the physical and mundane, I have been able to help my mother with many issues and thoughts regarding work and stress from that deck. It is the only deck I no longer require the LWB (Little white book) to give a reading, but I have it with me to read the "prayers" associated and give the book meaning if they ask.
Lakota Sweat Lodge CardsThis was more of a curiosity purchase. Haven't used them yet as I haven't been able to figure out how they are used.
Ocean's Oracle This deck is quite unique. You don't pick the cards. You look at pictures of the shells on posters and then you pick the ones that speak to you. You then arrange the cards in which ever ways make sense to you. I then tell you what each of those shells mean and how you orgaized them. Its a fascinating system.
Wolf SongAgain just a curiosity but one that I feel attracted to.
Russian Gypsy Fortune Telling CardsThis is completly different than any other system. I used it once and still couldn't fully understand.
Hidden PathWell Worn PathThose two intriged me as they were the first ones I have seen to specifically tie into ENP mythologies and rituals. They were also designed to be a teaching tool for Grimassi's tradition.