Normally, I would say The Spanish Tarot or the Jean Noblet, but the strangest thing happened, perhaps not so strange. I purchased a RWS centennial for a project, having never owned a RWS before, and I have just fallen in love. I had planned on using it just for the project and gifting it forward, hence why I purchased it cheap and used, but boy oh boy, I am not giving that deck away. It's all somewhat strange as I only really use TDM decks and playing cards, but one day about a month ago I started playing around with a Thoth I have lying around, and I was flabbergasted. What power and beauty! After being floored I wondered if I would experience the same feeling with the unnappealing, to me previously, art of the RWS. Well, I started a project, aside, that happened to involve the traditional RWS. I went looking for the cheapest used deck I could find. When I received it, shuffled it, asked questions, I was a goner! I fell in love, head over heels! I carry the deck with me wherever I go just to look at the cards when I can.
So my workhorse decks are:
The Spanish Tarot or Jean Noblet (for clients and myself)
RWS centennial for myself
Thoth for myself