I'm a little surprised he doesn't mention Lord of the Rings Online, which purposely makes the precise locations of many of its quests vague in terms of the map - instead describing them in detailed text, and leaving it up to the player to search for and discover the exact location.

That appeals to many folks, although when I was short on time I found it frustrating. It also resulted in a lot of chat channels clogged up with people asking "Where the heck is so and so?" and people alt-tabbing out of the game to search LOTORO wikis and the like.