The decks I use are all Rider Waite Smith based decks. I don’t use Thoth or Marseilles style decks.
I use the Radiant Rider Waite most often, but I have many others. I love the Gaian Tarot. I use The Anna K Tarot and The Llewellyn Tarot pretty frequently as well.
I am open to suggestions if you want me to read with a specific deck. Once a customer brought his own deck and I read for him with that, even though I’d never used that deck before. It turned out to be a great reading!