What is the appeal of open world content?

[Moqi]

Open world, when done well is incredible.

http://www.youtube.com/watch?v=HeR7D1PfbQg

When it is done poorly, like hunts, it is terrible. Btw I hope the devs can take a look at how open world bosses were done in GW2, no rendering issues even with hundreds of players, there is a sense of danger with their abilities, they don't drop like a sack of potatoes even though they are elites, and they offer equal rewards for participation.

Videos like these are the reason I've never been interested in MMOs. My brother plays a MMO like that, I watch him play sometimes but I just don't get the appeal of these fights at all :/ The reason I like FFXIV is because it's nothing like this.