Well honestly you'd have to know my brash bang bang killem all need to be lead around by the nose players. They're sort of the lazy type and they're used to running modules and adventures where there isn't much choice of what they do and they happilly just dope along with it. Go here kill that, fine. Unfortunately none of them are RT material, nobody takes charge and even finding a regular leader is difficult. With that playing the RT classes all I'd have would be like three arch militants and two void masters, if I was lucky and they ALL didn't play arch militants. The Dark Heresy system gives a lot more variety in basic shootem up guys.
I note that RT starts at much higher experience levels and you need to do a lot of stuff with your characters to just gain one level, which wouldn't suit my very goal oriented I want lots of advancement players. DH characters gain levels like scars, maybe even quicker. There's also the fact that DH characters are far more tailorable to particular roles and they carry their own money. The idea of Profit Factor goes right over their heads, they want gelt in hand.
As the game progresses, they now have their first ship and they're starting to use RT rules more than DH, I'll be headed over there. I note a wandering of interest though with all the more esoteric rules and lack of someone cracking a whip over them telling them exactly what they'll do next.
We have a lot more material available and adventures to tell, but the lack of interest in this forum makes me a bit stingy about spilling my guts about all the weird and wonderful stuff they've done so far. I'm sort of in the, "well nobody's showing interest, I'll get around to the next post, later" stage.