Everquest is quite an old game, and being so many people have played it at least a few times in its long history. This makes for a fun game to revisit to get back some of those feelings of many years ago.
This game was made far before WoW came and made questing the way to level up. Leveling involves finding a place to group up with other people and grind the same enemies for hours, only to possibly have it all undone when you die (which means an exp penalty).