I like to play most of my games in casual mode, climbing ladder just doesn't interest me. I know there are lots of ways skilled players can climb with non-meta decks but whenever I play ladder I usually just end up playing the decks I'm already accustomed to. That can get boring sometimes.
I love casual mode so that I can just craft goofy decks and mess around. Lately I've been having fun with Zin-Azshari Warrior, and a deck that is just Roll the Bones and a bunch of deathrattles. My problem is that I find casual mode is just stuffed with Secret Mage, Rez Priest and extremely streamlined and competitive decks. Maybe it's just me but I think it's kinda bad manners to go into casual with decks that aren't...casual?
The most enjoyable games are when I find somebody else just trying something weird and we have a unique match. It's fun playing the odd game where the stars align and the meme works and gifts you some crazy outcome but if I'm constantly running against competitive decks then I never really get that chance, which kinda sucks.
I'm not saying Blizzard should do anything about this, banning anything from Casual mode would be dumb. I just think that it should just be good etiquette to reserve your strongest decks for ladder and to approach Casual mode more casually.
It's a small nitpick really, maybe I'm in the minority on this one. Would love to hear what other people think!