Raindrops on roses and whiskers on kittens:Chaos

Chaos Daemons

Pros:

• Interesting special attacks
• Daemonettes (boobies!!)

Cons:

• Too many to list;

Chaos Space Marines

Pros:

• Chaos Space Marines (nuffsaid)
• Defilers
• Obliterators

Cons:

• Chaos Dreadnoughts (fire frenzy sucks)
• Generic units

Summary: Once upon a time, Chaos had these really interesting army lists. Lots of choices, mortal champions alongside summoned daemons, chaos "gifts" to really personalize your army and match your playing style. I can only assume that somewhere in that great big orgy of mutation, bolter rounds and warp lightning, too many players were using all of those yummy options to mini-max their armies. Now they've separated the Daemons from the Marines. Neither list has "cultists" in it anymore (no Traitor Guard for you, my pretty) and what Gifts are still available are only available to the Daemons, and even then only in very specific sets. No longer can a player create their own truly unique Champions and Princes. The only way to step outside the generic list is to take a pregenerated special character, and unless you're truly dedicated to a "fluffy" army, there's virtually no reason to take anyone but Abbadon. Finally, the only Traitor Legion I ever really identified with were the Iron Warriors, and without the ability to take allies, and no special wargear or vehicle sections for them, you're pretty much SOL (no more Basilisks for the "seige experts").