Coming back after 10+ years, returning to Chaos but which?
I last played in the days of 3rd edition and am recently looking at getting back into the game since I have a game store close by where 40k is played often. In 2nd and 3rd I played Chaos and I'm looking at starting a new Chaos army (I don't have any of my old stuff). I have the Codex and the Chaos models from Dark Vengeance and am currently thinking of what I want out of the army to start looking at additional purchases. I'm by no means a super-competitive player and the local meta is more fluffy/friendly than competitive, but I also don't want to lose all the time.
I've narrowed it down to two choices, the first being a fairly fluffy Crimson Slaughter army and the second being a Nurgle-themed (but not Plague Marines, see below) army representing the Grey Death renegade chapter mentioned in a paragraph in the Chaos Codex from the Abyssal Crusade.
I've been reading the Crimson Slaughter fluff (Dark Vengeance, Crimson Dawn and the new supplement) and their backstory really appeals to me, however I'm not a fan of Possessed and if I did a Crimson Slaughter army I'd like it to be kept true to the backstory so I'd be looking at an undivided force of Marines, likely with Cultists, and backed up by daemon engines and vehicles; my idea would be to have a force that looks very much like a regular Space Marine army (as they are a newer renegade chapter) but then have the daemon engines to show that it's clearly corrupted. Also the Forgefiend/Maulerfiend are some of my favorite models based on looks alone :D
The second idea is as said before the Grey Death, which is a Nurgle-aligned warband mentioned in a paragraph about the Abyssal Crusade. This would basically be a clean slate as other than the name of the warband and the fact they used to be the Iron Drakes Space Marines, and that they surrendered to Nurgle on the world of Anathrax after half of them were infected by some spores and mutated into giant fungus things, there is nothing about these guys so I could do whatever I want. I know that Mark of Nurgle is very powerful but I would likely make the core of my army MoN Chaos Marines as opposed to Plague Marines as it's always seemed to me like Plague Marines (as in the actual unit) were mostly Death Guard (although I might field some), and this army would give me a good opportunity to field a Daemon Prince (whereas one really doesn't fit in with the Crimson Slaughter army), another model I really like the looks of. However this concept doesn't seem to lend itself to being a fully fledged army but rather a warband roaming around somewhere, and there's also the fact that nothing is written so I'd have to come up with my own color scheme, characters etc. (which can be both good and bad)
So I am torn between something that has "supported" rules and where I like the fluff, with something that gives me more or less free reign to build what I want and come up with my own background. Tactics-wise it seems that regular Chaos Marines are pretty lackluster but I'm not sure if giving them Mark of Nurgle is worth doing either, so the dilemma is which would be more effective but at the same time I also want to have a solid, fluffy army on the field no matter which one I pick, but I think either will give me that option.