Moving this from another thread with some additional ideas.
I think the new quest system will be fun. I am not trying to change it into a "pvp quest system", but i think a few pvp quests could be super fun and a great dynamic addition to the system. Pretty much all of these quests would be based off a re-instated karma or at least alignment system, where you would only be given quests to attack or cause problems for towns of the opposite karma / alignment. Here are a few suggestions of ideas for quests.
1) Most Basic PVP Quest - Head Collection / Turn In.
NPC - "Them damn Umbras / Tree Creepers / Fire Creepers (other evil (or good town if evil)) been stealin mah potatoes and impregnatin my daughters. Ill give you 2000 xp for each head you bring me" etc. etc.. Very basic quest where killing any member of said town will give you their head. This is not typical bounty head and cannot be placed as decoration, but turning it in would reward experience (or coin / gems if max level?).
2) Bombing Run Quest.
This would be an espionage type quest that would potentially not require any fighting. However, it would require alot of coding id imagine and may or may not be possible = /.
Quest "Set them up the bomb" NPC Dialog - We have intercepted super secret access codes that will give you temporary region access to <insert town with opposite karma of yours>. Your mission is to take this bomb (random block) and place it within town at (x cord, z cord, random y cord between 40-100 to make sure the location is above ground). Please note all chests in this town are protected by invisible super-ninjas that will instantly kill you should you try and abuse these access codes to steal (instant death by opening a chest). Once the bomb is planted, protect it for 5 minutes to ensure detonation. Reward - experience / coin / gems (maybe bonus for each person killed by explosion lol). If town successfully defuses bomb (by say breaking it), they are instead given reward.
This would require that the tnt / region regeneration mod be in effect to work. It should be like any blocks placed or destroyed by you will disappear / regenerate within 2 minutes (except the bomb of course).
Also, to prevent stealing abuse by working with people not on the quest, this would require some pretty significant restrictions on what could be done in town when someone has temporary region access. I would say anyone not a a member of the town should be insta-killed by opening a chest in town when someone has this quest. Could have a warning message when entering region "warning - region currently under bomb assault. Chests are booby trapped. You have been warned". To prevent towns from using this to make their chests perma unraidable, the quest duration should only be one hour or something. Could also charge the person that accepts the quest something (coin, etc) to make it even less abusable.
3) Ye ol' escort quest
This quest would require implementation of leads from 1.6 - not sure if any issues surround that. This quest would involve setting up npc farms at different locations around the world. You would be given a quest to take "resources" (farm animals on leads) back to your town. When someone accepted this quest, it could give a message to opposite karma / alignment that "someone" (dont know if it should give name or not, not sure which way would be more fun, probably no name is best but wouldnt matter much during low population times) is attempting to transport resources from <Farm Name> to <Town Name>. Rewards could work several ways. I would think the reward for escort quest acceptor should be based upon the distance from the farm to their town. I would say the live stock should have 50,000 hp or something significant to make killing them while fighting other players a non-option. If enemies successfully kill the escort party, they could have two options - destroy the animals for a smaller reward, or instead try to escort them to their town instead for a larger reward.
So these are a few ideas, feel free to add your own . . . i probably will add more later