Definitely all god specific classes like Khorne Berserks or Noisemarines and some sort of Champion with gifts of the dark gods (or maybe earning them).
I suspect I'm a Khorne fellow. I want bersekers to beat the crap out of people with and Havocs to rain bullets on people with. Well, ok Raptors as well ofcourse. To smash from above and then tear them apart.
I honestly DO NOT want Chaos god specific units for the entire faction. My favorite Traitor Legions are all apathetic or at most Chaos Undivided in Night Lords, Iron Warriors and Alpha Legion and I'd like to have them stand on their own. I also do not take Marks on my TT army accordingly.
Even then, if they had Chaos God specific units, they shouldn't have the Iron Warriors as one of the Legions. It does however look quite clearly that they'll use something similar to the units of CSM's in Black Crusade or the traditional CSM approach- Aspiring Champion, Sorcerer, and Raptors. What I'd like however is if they stuck those three, with the fourth being a Chaos God special unit if you select a preferred god.
the way i see it is that each race has factions within it , for example: sm's get space wolfs, sisters of battle, ultramarines etc, chaos gets the big 4 primarily: Nurgle, Tzeentch, khorn, and slaanesh, and the orks and the eldar's factions are unknown to me but they all have more than one thing in it so for me i would want to say i worship nurgle and i want to be a plague marine or a sorcerer, or a khorn berzerker that means your limited to what the basic classes are so if you go with tzeentch you don't have to be a sorcerer but something else im not sure what they might do about that but it would be an awesome thing for every race.
I would love to have the ability to become possessed by a Daemon. In this case, being possessed by a daemon will allow you to use super powers, like super strength, super jump, super sprint, climb buildings, brutal execution finishing moves etc.
