That's kinda surprising, since GW2 doesn't actually have quests (outside of Core, Expansion and Living World story). I played quite a few MMOs and I think ESO's and Runescape's side (story) quests are pretty good. WildStar had the best questing interface which avoided unlocking, fetching and handing in quests by using a communicator device. It had some nice (zone/story) quests, too, but overall there were too many (boring) quests which you mainly did to grind XP.