They're a great faction for a first campaign partly because of the light hand-holding of the Grudges, and partly thanks to fairly well-rounded army composition. I've fallen for the Dwarves, whose Book of Grudges delivers a steady stream of short-term objectives that serve to guide my efforts and provide a neat narrative context for the many minor wars and disputes that arise. Total War: Warhammer's greatest strength lies in the diverse approaches demanded by the playable factions. I've spent some time campaigning with Khorne and co to figure out if this barebones approach to the game is effective. Playing as Chaos, the game really is Total War, with no distractions.
The Old World map becomes a chain of battles and the core of any Chaos strategy is to build and maintain forward momentum as you carve your way through the factions. There are buildings to construct, but they're part of the caravan of carnage that makes up your nomadic horde, and when you lay waste to a settlement, occupation isn't on the cards. The life of a Total War: Warhammer Chaos Warrior is simple, with few diplomatic interruptions and little in the way of urban planning.