|'Dragonqueen... Life-Binder... preserve me...' -Keristrasza|
There are tons of great quest chains which have great depth in their storylines. Icecrown and the Storm Peaks in particular have some great chains. The Sons of Hodir quest line is an interesting one lore-wise, particularly as the completion of the chain explains much of what is happening in the Storm Peaks and sets up much of what you see in Ulduar. Icecrown has some amazing chains as well, from helping the Argent Crusade gain a foothold, to taking back the Shadowvault for the Knights of the Ebon Blade and, in particular, the plight to save the soul of Crusader Bridenbrad. The Guru of Drakuru chains are also fun ones which take you through the history of the trolls in Zul'Drak and Grizzly Hills.
One of my favourites is a questline out in Coldarra in Borean Tundra. I love most of the storylines involving the different dragonflights (I love all the quest chains from Wyrmrest Temple), even moreso when connecting the quests and history to the book trilogy War of the Ancients).
This one in particular is picked up as you go around Coldarra to help the red dragonflight (you'll be sent to Coldarra after assisting on Amber Ledge in Borean Tundra). Eventually while fighting the mages and drakonid you'll pick up a fragment of a strange prison, which is actually holding Keristrasza prisoner. Through the quests, you help to free her and eventually set up a trap for Malygos. Unfortunately, Malygos takes Keristrasza prisoner, forces her to be his consort and attempts to turn her into a blue. It is then we are asked to venture into the Nexus and 'do whatever is required to spare her this fate'.
After doing this questline, it always strikes me as sad when we have to slay Keristrasza in Nexus. It's a tragic fate for the dragon, and another of the many captivating tales strewn throughout the quests in Northrend.
Are there any quests that have had particular meaning or memory for you? Which have been your favourites? Share your thoughts!