Wow this is all looking super beautiful. I love it! You're on a roll, Meph
I personally would like to see random tiles on engraved stone walls and floor, but not on non-engraved smoothed ones and not on constructed ones. Or, at lest, not big differences - I'm conflicted about the gold wall because I love the detailing but the lack of symmetry is painful. I may be able to rationalise that though because we can't 'engrave' a constructed wall, so that might be a substitute for it, so crack on with that for gold and silver, I guess
Small cracks and changes in colour for floor would be great, randomly chosen coffins and statues also would be great. Maybe small differences in cabinets and coffers? I usually only place one in each room of a regular dwarf, so it wouldn't annoy my symmetry sense if they were different in different rooms. Random bookcases? And while we're at it, can you make bookcases that are actually filled with books or will that look too busy? My libraries look weird with all those bookcases but no books in them. I don't suppose you can make the game change the sprite to a filled bookshelf when books, quires, scrolls, or codices are put inside a bookcase, can you?
Love the animated workshops, and love the look of that minecraft dwarfy art you used in the gold pack. I still want to contribute, and as soon as I get some time and an idea I totally will - this is just too good to pass on. I'm thinking of some female dwarf statues and coffins, and pondering the glass constructions and furniture.