These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Alt-itis: People like to make new alts whenever the starter deck gets changed.
Berserk Button: Go ahead, mention that you are playing a Urgrant/Return/Mix of Both file. It won't end pretty.
Broken Base: "Free players v. Paying Players." "Pixies/Card X needs a nerf." "Alteil US changes vs. Alteil JP"
Evil Is Sexy: Several Lawtia Female Characters tend to dress with a bit less modesty than those outside the sphere, but boy do they look fine! A perfect example is Chaos Lady / Annarose.◊
Game Breaker: The community has always complained about at least one card combo, with every expansion.
Gameplay Derailment: The game developers are constantly making changes with input from the community because of the metagame.