Like Emily... my go-to deck is the Liber T for a whole constellation of reasons. Some people I read for ask me for other decks specifically, and I can read them with pleasure, but the Liber T is 80% of my readings. That's happened slowly over several years as I've gotten to know more about the deck and what it can do.
And more and more thoguh I take many decks when I'm going to read at an event, I just steer people towards it because I know what I can do with it.
The hard thing for me now is that the Liber T has spoiled me for "thinner" decks. The more I've learned abotut it and from its images, the less interest I have in squeezing meaning out of something that is pretty but empty. By the same token, I find that symbolically "rich" decks have deepend and interpenetrated my understanding of the Liber T and vice versa. That's true with the Thoth (which parented the LIber T), indeed any GD-based deck, and even historical decks. The deeper I've dug the more my understanding of the process of reading has changed. And frankly, I feel like the decks I use actively are decks that make demands on me and not the other way around. If the symbolism is incoherent or random or purely decorative, I won't bother reading with it for long cause I have bigger fish to fillet.
I am certainly not part of the "one deck wonder" crew, but I don't really need/want to be.
The Liber T just keeps rewarding further investigation. Far as I'm concerned, Scarabeo's 78 pieces of cardstock only hold the images that I'm reading; My advice would be to read with a deck until laziness and inattention intervene, whether it's the creator's laziness and inattention or your own.
And I think that's the answer: you should read with the deck because it forces you to pay attention and gives you palpable return on the investment of your time and energy...
Scion