I try to stay away from non-tarot decks; I'm afraid, in addition to my taroholism, my bank manager wouldn't survive it.....
However, I do have a couple. I love and occasionally use the Fairy Ring oracle, by the same people who did the Sacred Circle tarot deck (sorry, it's late here, can't remember their names).
Although the book is excellent, I tend to ignore it when I use the cards and just go with the images as I see them.
For some reason it's very much a springtime deck for me.
I also use the Soul Cards (I at the moment, I'll move on to II soon) every night: I pull a card out and put it on my nightstand as a dream card, something to meditate on while I fall asleep.
Often I will feel I haven't finished with a card after one night, either because it is very attractive or the opposite, 'unpleasant' and difficult, in which case I'll keep the same card for a number of nights, until I feel i'm finished with it for the time being.