How should MMO quests be delivered?

I was tinkering in Ultima Online last week when I spied something I had forgotten about: quest givers with yellow exclamation points over their heads! In Ultima Online! The much-maligned mechanic has even retroactively invaded ancient sandboxes.

But I started to wonder what MMO players would accept as a mechanic for quest delivery. World of Warcraft's exclamation points are hated, Star Wars Galaxies' mission terminals seemed artificial, WildStar fans complain about pop-up quests, and there's no way I'd want to go back to EverQuest's keyword-based quest text. Hail, a_quest_giver_001!

So how, exactly, do you want your MMO quests doled out?

TH

quests should be rare or random events that award like cosmetics or some nice shit rather than just grind bullshit.