Ive got a few Tarot decks. I havent studied them as well as Id like to but I still can. It seems most of my life Ive been around them for some reason. Weird. I think my mother had a set and I remember looking at them as a child. I saw what I now know was the 1JJ Swiss deck at a friends house once. I had a friend send me a standard Rider Waite deck as a gift back in 01... just seems I was meant to get into them at some point.
They are good for intuition and focusing and though they cant really tell the future persay, the 'answers' they give to questions can lead to some clarity and meditation on an issue.
I have several decks now: the Thoth which is a wicked wicked deck and it has a whole nother set of rules and guidelines so to speak then other decks. I have the best Halloween deck out there and being a Halloween NUT I connect with that deck perfectly. I have the original Londa Deck, I have one of the Goth decks out today, the Revelations deck, Dark Matters deck, a Radiant Rider Waite, plus the one my friend sent me. Seems Im missing a deck in this list and Im too lazy right now to look heheh
There are thousands of decks out there and there is no right or wrong deck. The trick is to find a deck(s) that has the images that you can connect with the best and it doesnt have to be just one deck. Ive read where some people have hundreds of decks... no way for me LOL but I do have about 8-9 decks.
Here is a good site to check out:
http://www.aeclectic.net/tarot/
It has examples of a LOT of decks and a forum and can really help you learn and understand the cards.