I've changed the imps in my mod, now they are more agressive and darker. And I feel that the old hissing and dromedary sounds does not fit with them anymore. I'm thinking in new sounds to use for them, but I can't find any real nice. I want something more scary and disturbing.
The Doom3 Imp sounds are nice, but overused. Necromorphs sounds are too much 'human', and would be annoyng in game, I think. Doom64 sounds are nice, but also overused. Maybe the sounds of the Doom3's maggot, I dunno.
Since most of the modders here makes new stuff, I believe this is the best place to ask for it o.õ