Hi EtherealTarot! No problem here either with reading with other decks around! I too have ended up with lots of decks in my world, and I have a variety of decks on the table that I lay the cards on. I am very attached to many of my decks, and they often can feel like "friends" BUT, to me, decks don't have "feelings". So, how to explain what seems like 2 conflicting statements?
It feels more like decks are mirrors. They show us, and reflect, what is going on. I suspect that very few Tarot readers ask their decks, "How are you feeling?" before reading. Here is something for your pondering pleasure. Often the first layout position is some kind of SITUATION position. The "Situation" often reflects the question, "How am I feeling?" I am guessing that the deck may actually have been reflecting something in your world to pay attention to? Have you pondered how the 3 of sWords could be a message for you? Do you see both good sides, and troublesome sides to the cards?
An aside: Many of us have done a "New Deck Spread" to find out attributes, strengths and weaknesses, etc, of a deck, but that is not asking the deck itself about "its" feelings.
ETA: I have been pondering how I would possibly consider decks "friends", and also say paper has no "feelings". Maybe the pieces of paper reflect different parts of our personalities? So, it could be creating friendships with
ourself? I do believe that decks are a way to receive communication and messages from our Spirit Self, higher self, Universal Wisdom, or whatever name we individually call this...
I know, these statements kind of feel like an oxymoron of opposites, don't they?!