I was suggesting Horror really, have a look through my posts, do a search in profile, I have made loads of posts on objects to make, I remember doing a post on horror architecture, that would be usefull. architecture pieces rather than little objects are more interesting to me, after all you have to fill a level up.
Just noticed, you can only search threads and not posts, that makes it tricky to see all the stuff ive posted on things to make in my posts on the matter.
Perhaps do some architecture you can double up with, both horror and sci fi, so make the models and have two versions of the skins, you could make 2 packs then, even better, same models just different skins/textures. Double the fun, and interest.