So far I've done every collection/loot quest, and so far it was worth it. Drop rates have been high so far, had a few 100% drop quests in a row wich made it more of a kill quest rather then a loot quest 8) (needed 15 shards, so 65 kills later I was done: 20K xp for the quest and 35K xp for the kills made during the quest.. not a bad deal )

Just a little heads up to just go and do them, it's worth it in the end, due to teh follo ups