Do it.
It will change how you read and your skills as a reader, radically and irrevocably. It's one of the best things you can do for yourself with Tarot: learn a worthwhile deck stem to stern over a period of years. You will develop skills you wouldn't have imagined.
The Liber T is my reading deck. Before it found me, I read with the Thoth & Waite-Smith over a period of decades, and sort of stumbled onto the Liber T backwards. And the deck snuck up on my imagination. I've been reading almost exclusively with it for a couple years and it has kicked my ass in every possible way. Not only did I totally uncover root-level lessons about divination and its history, I've started to develop a sense of the esoteric bones supporting the Golden Dawn system specifically, and Tarot in general. What did it bring me?: focus, knowledge, rigor, balance, discipline, skill, economy, precision, accuracy, patience, commitment, insight, inspiration... and no small measure of magick.
I still buy decks because I love to absorb them and study them and compare them; I'm a born librarian that way. But I
read with the Liber T. Having said that, after a couple years of being "monogamous," I can practically read with matchbooks or anything else people hand me. My muscles have been developed by devotion.
The Liber T has landscaped my divinatory imagination and intuition, populating it with symbols and connections that are constantly proliferating.
One caveat:
Pick a deck with some real traction that will challenge you. Pick wisely, because if it's a "thin" deck it won't bear much scrutiny. If you're going to burn slow and long, you need a hardwood log on the andirons. Lots of people will tell you to "pick what feels right" but that doesn't mean what you're necessarily comfortable with. You want something that will demolish your comfort zones. Pick something that makes you want to be better reader... hell, a better
person! It's a little bit like choosing a friend in whom you confide over a long roadtrip; there are some people you gossip with, and THEN there are a very few that you trust to hold your wallet, clean up your vomit, and watch your kids in an emergency room. You're in it for the long haul, so take a long-haul deck.
Do it. Don't look back. You won't regret it.
Scion