What is you favorite chaos faction. Mine is Nurgle for some odd reason, I always loved thoses little gits.
tzeetch is the way for me all those deamon and magic
They are all very cool. But I used to love Khorne, but the lure of Slaanesh is strong!
In the new books, I'm really digging the synergies of Slaanesh. An army that must work together to be effective is what I think all armies should work. Slaanesh used improperly will blow up on you, but used well can really put out the hurt.
My old favourite was just Undivided; loved the idea of Norse warriors.
i just love nurgle, easy to convert, beautifully ugly... what's not to love.
Yeah, Nurgle all the way.
I'd have to say my favorite is Khorne, though nurgle is about tied. Never been a big fan of slaanesh, but have played tzeentch.
Well I've collected all four, in the last edition I favoured Khorne and Tzeentch. Most of my daemons are Nurgle though, and I'm being drawn to the idea of a slaanesh army
Undivided and Tzeentch
Not sure why though... Undivided because it's all of them and Tzeentch because he's cool and dark purple and all-knowing and magical etc etc...
Tzeentch has always been my fav but a rethink is coming with the new books ,however i can wait
My personal favourite is Nurgle, although I think Tzeentch is probably the most truly Chaotic of the Chaos Gods.
Tzeentch of course. Intelectual power.
I love tzeentch becouse he is power, he is change, and he is Magic.
if i have to pick it be khorne.They have cool colors
slaanesh all the way, its my first army.
Out of interest what colour schemes do you guys use for your Slaanesh army. They always seem to be the least defined
I use tentacle pink and liche purple (and no its no joke)
Nurgle all the way. Have been tempted by Slaanesh but have managed to resist so far.
although I think Tzeentch is probably the most truly Chaotic of the Chaos Gods.
well said 
or 
My favorite one is Khorne. Eventually I'll ground my own diabolic, devilish, bloodlonging and immortal horde!