Wanting to get server fists on various beginning raids in Wrath of the Lich King, most of the guild's core raiding group were up for two and a half to three days getting to the level cap. We ended up getting server firsts on every raid available at launch. So I guess it was worth it? I've been clean from WoW for six years and I look back on some of those playing sessions and wonder how I did that.
I got sick after that, there's only so many 5 hour energies your body can take.
edit: Yesterday a friend and I played Division together from 8am until 1am so that's pretty long. Luckily the wife brought me food and drink.