I had to go look it up. Here is the 4E PHB page 258:When I think of player authored quests I think of the example I often give. I'm telling the DM that my fighter is going to travel to the northern wastes to unite the barbarian tribes under my banner and raise a new kingdom. It gives him a clear, possibly achievable goal for him to flesh out. I don't normally view treasure as part of it, but it could be if the quest was to track down the location of and acquire a rod of lordly might or some other powerful item or artifact.