You mean before they became mary-sue's that committed CIA/KGB/(any spy organisation really) style witness genocides for the sake of holier than thou secrecy? Well I heard legends of vastly outnumbered silver chaps with 1 good gun per squad (the fact that they where always going to war as underdogs) fighting with such balls of steel that colonel "I wear Catachan Devils as boots" Straken would personally gather the most beautiful flowers of Catachan and put them on the monuments dedicated to them out of respect for their sacrifice. At least the 7E codex removed most their mary-sueness and had them show regret and remorse for those murdered for their silly secrecy (from what i heard).
Before Matt Ward: Fluff wise they were fighting a desperate war with crazy high casualties against the forces of Chaos. They could fight any demonic foe, even a fallen Primarch, but they would pay dearly in blood. They did so willingly and with zeal in their hearts for no Grey Knight has ever fallen to Chaos.
Board game wise they were hard as hell to play. They could be quite powerful but the experience required meant that most went for other, more numberious, Space Marine armies.
After Matt Ward: Fluff wise they are invincible, incorruptible, and crazy powerful. More so than any Primarch or even the Emperor himself. They wipe the floor with greater daemons and carve insults into the hearts of Fallen Primarchs. But what really pissed a lot of people off was that they make use of things that is considered ultra heresy (they use freakin' DAEMONS).
Tabletop wise they can kill anything and army list after army list can be made that is simply unbeatable by most every army (except the Imperial Guard and they must spam flyers and artillery to have a chance). If you made a Space Marine (of any flavor ESPECIALLY CHAOS), Tau, Ork, Eldar, Tyranid, or Daemon Army (which would have been incredibly dumb even back before the Warding) the odds of you winning against 6th Edition Grey Knights is incredibly low.
Ic thats sad indeed. I used to play Khorne(4th edition). The 5th edition CSM codex fucked up my army and i focussed more on drawing so i quit the whole WH thing. I still like the universe though maby ill read up 6th edition sometime.
I play Chaos currently (at least until the new Ork codex comes out) and while it does feel you have far more limited choices as far as equipment is concerned compared to Loyalists the favors of Chaos really bridge the gap now. Daemonforge "vehicles" (less vehicle, more pissed off imprisoned daemon in a 7-ton rape machine), Marks of Chaos, and Chaos boons really make up the difference.
Crudely delivered this page will give you a good idea where to start: 1d4chan
is that a bad thing? i am barely geting into the whole warhammer 40 k universe so i dont know much about it yet , so is that a bad thing? i tought they where suposed to be the best the empire have to offer
No despicable trickery will thwart us, no Damnation shall bring us low. There is no peace for us, for an eternity we will strive. Though mere mortals in His service, everlasting shall be our True Duty. Et Imperator Invocato Diabolis Daemonica Exorcism!