Never took to comics for this kind of thing as weekly/monthly prints ment the stories were far too short. However, when released in a larger 'graphic novel' they can be pretty good. I enjoyed AD2000's Bad Company and Rogue Trooper stuff when it came out as graphical novels.
I'd like to see an Ork release. I dont think I would have any time for more space marine religious fanaticsm. The piousness and denouncing everyone as a heretic is really putting me off 40k stuff. To hell with Space Marines, Chaos Marines and Imperial Guard. All too predictable and boring. (Hah predictable chaos - you know they failed at story telling when you have predictable choas)
Gimme Orks, Eldar, Tau and Necrons.
Unless its Battlefleet gothic, then just give me epic space battles.