Flagging Quests vs Finding Quests

[Klefth]

That'd be a pretty good idea for the simple and shallow exp. quests, I guess. I like it.

another way could also be that items that you happen to find while exploration can trigger quests.

like in the OP scenario you get some document (rare/ex) after killing the boss containing references to a quest.

This would be pretty cool, too, but people would then cry for the exact item and the location of said boss to be pointed out for them in obvious fashion (gigantic golden markers, anyone?), completely defeating the purpose of your idea. :/