I tried modular a while ago, and it's cool, but I want something truly random. Right now, for maps, it creates random polygons and connects them together into a map, and then populates it with random real world items (like additional walls, or pillars, or rubble) and additional random floors and doors. There is still a sameness that can happen, but the real world is that way too, most warehouses look the same.
For the models, I'm building bones, and then skinning around the bones. The map stuff is getting there, but the model stuff is just terrible right now, I'm still feeling out my way into doing this. I think I finally have something interesting that only I'm doing, or at least to this degree.