Player skill level classifications

[Dzian]

People need to stop misusing the word casual it has no reference at all to a players skill or ability.

For example

HARDCORE: Can clear everything, progress through ultimate and one day will beat it if they don't burn out of the game. Pretty much a master level player. Raid leaders in general are this, hardcore spend significant time optimizing, leading, managing, and dealing with all aspects of the game.

You can do all of these things (and even all the things listed on your lower tiers ie care about rotations and gear) but only play casually for a few hours on weekends.