There was a collection quest I really liked from the pirate island in Fjord -- you had to go kill some bears and get "bear musk". The nice thing was when a bear dropped a musk, it dropped for EVERYONE in the party. There have only been a handful of collection quests like this, virtually all of them are the same ol "1 drop per kill".

Don't really understand it, it discourages people from grouping since you spend longer killing stuff, I really wish Blizzard would change their quests so all collection quests drop an item for everyone in the party. Would not only encourage people to group up, especially in heavy camped areas, but would be great for multiboxers