Why do people want solo play in an MMORPG?

[Shougun]

I could name a few, but than people would get angry at me for saying MOM upside down XD. But instance xping is pretty common, specially with rested XP. You can hop from instance to instance in the same party for few hours. In other MMO's that I have played, instance grinding was probably the fastest way to gain XP, way faster than grinding quests. Not sure how ARR will be but from what I understand this will be possible.

If I remember a translation correctly back when Yoshida was talking about how dungeon loot would roll out - he said there would be level instances as one of the means of leveling, for those who did all the quests (which he said there are a lot of), and dont want to do other contents like FATES, leves, and behests (guildhest).