WoW has a number of quests that can be picked up by getting loot drops and finding objects in the open world. Some of that would be awesome. Stumbling upon some of the longer lore packed quest chains in WoW was really neat experience (a few of them are upwards to 20 chains, packed full of information).

This list is alright: http://www.wowwiki.com/Long,_excepti...den_questlines

Their parody quests are funny XD. Linken to the past... lol