I play now this simplistic aggro deck and I’m often like “this is at the limits of my intellectual capacity because I can more or less play perfectly most of the time”.
In contrast though some monstrosities like the big Highlander decks filled with Legendaries or even just a The Countess may make me feel the opposite.
Never.
I always have the same feeling like I could be playing better.
There’s always something:
With slower, more complicated decks it only gets worse, but that feeling never really goes away. I am constantly on edge trying to determine if there’s a better play although I play incredibly fast.
I wont rope, almost never, but after the game is over I’ll think about the crucial moves and keep in mind then next time in a similar situation I have to play it differently if I lost.
That’s probably correct, in the sense that at the very least: mistakes can be made.
But I think it’s also crucial to not fixate on the same deck.
I get the urge to swap them more often but I don’t allow myself because anytime you switch decks, you need 2-3-4-5 games to adapt to it, so it’s punishing when you grind
Maybe after 100+ games you can safely swap between decks but it’s useful to fixate on one deck until you master it
if the meta allows it
I mean, that’s at least how it works until top legend but i haven’t been there for years, so I don’t know
2k legend is my top since I came back 
you should play whatever deck make you happy, if your not having fun, whats the point
It’s about the balance of winning and having fun, IMO
I can swap decks per my mood but if I keep losing and not progressing, it feels bad, then I’m not really having fun
I’d rather play a deck which wins 10% more often and then when I’m stuck and can’t progress, I can swap decks to have fun and see if I somehow break that barrier
But in my experience, that’s exactly when I should continue playing the deck to break that barrier, because I’m already adapted to it, and now I just need to find that one little thing to change to improve further
Without frustration there is no fun. that’s how things work.
What does happiness mean if not contrasted to unhappiness?
What does light mean when there’s no dark at all?
Obviously I’m not gonna lose my mental health because of a game, like some of the people xD But I know I can’t have fun without a bit of frustration
I don’t mean to swap decks. I think the optimal kind of play always needs to ask the question, “do I really need this card in this deck?”.
I don’t think about that too often.
I used to do that 6 years ago but now I don’t have enough knowledge to attempt changing the decks. It takes a lot of understanding of the meta, much more than 2-3 months of play
I did make one card swap, lately, tho - I removed Sir finley and exchanged it for Astalor in Rainbow 2.0 Mage
I figured I already have enough card draw and I could really use another win condition and it worked nicely
When it’s the right thing to do, you usually feel like one card is annoying you again and again, and more often than not it’s useless and you’d rather have topdecked any other card. When that happens, I just go to collection and swap it for anything which makes sense to me
EDIT: Until you’ve played hundreds of games, I wouldn’t recommend swapping anything out of a top tier meta deck. If you don’t know what to do with a certain card, it means you’re missing some decent combo which could improve your win rate
If you only lose after playing that card, replace it
You’d be surprised what mistakes I notice in a popular deck currently being a meme. 1 single card change makes it win over Sludge Warlock most of the time for example while it doesn’t become weaker approximately never.
But of course:
It needs an analytical mind
It needs experience (I’m fixated to the same 1 deck for weeks because of account limitations so I’m “forced” to have great experience on it)
Even if you fail: it’s still a learning experience e.g. I was trying to make a “fully original” deck and I failed 3-4 times (swapping 1 card is way easier).
Sure, if you’re comfortable doing it, why not
When it pays up it’s hella good feeling
I don’t really feel that way but I do occasionally take only basic (no rarity) legacy cards and make a deck and when it wins I laugh it must be so embarassing when a wolfrider nightblade or elven archer kill you
Seeing as I’m just not a very good player, I feel like whatever I’m playing is ultimately better than I am.
With the exception of a handful of loser decks, which we are all better than. Well, most of us.
I once made a deck that was ONLY “Discover” cards (and some Discover-adjacent cards (e.g. Excavate)). Needless to say: the intellectual capacity you need on those decks is hilarious; every single card produces almost countless possibilities; you keep having every single card being a new multiple-choice.
PS. Too bad it wasn’t great; those minions are rarely great in themselves (mainly their bodies are weak); it’s probably on purpose because Discover in itself can become EXTREMELY powerful rarely (e.g. giving 2-3 low-cost legendaries early) so the card-bodies have to be weak most of the time.