The original/standard RWS: It's a must. A deck I can always go to and the only deck I think I can recall each card in my mind without having the deck in front of me. I've never understood how some people find it ugly. To me it's timeless and the most important tarot deck ever printed.
Crystal Visions Tarot: Stays close to the RWS but has beautiful colors which I absolutely adore! I love the pink, blues, and purples - really appeals to me! And so easy to read with.
The Ludy Lescot Tarot: I'm not usually a fan of dark decks, but this one is just something special to me. I just instantly connected with the images and this deck makes my jaw drop on a regular basis, it's just sooo spot on and honest. I like how it's quite original and not all the way a RWS clone.
Dame Darcy's Mermaid Tarot: A deck I recently purchased and to be honest I haven't had the chance to use it a lot yet. But it was love at first sight and this deck just called to me. It feels very exclusive to me, I have no other self published decks in my collection.
It just has soul ya know.
(As a bonus I must add the Robin Wood. It's gorgeous and after using it for many years it feels like a loyal old friend filled with love and wisdom.)