As far as I have read, pretty much everyone here based Golems on Rabbi Loews story. Personally I prefer mechanical Golems.
For the sake of being dwarvy, I would suggest the following:
1. Golem only can origin from strange Moods.
2. Golem Type depends on
2.1 the Dwarves exact Mood:
Fey : Mechanical Golem
Secretive : Mechanical Golem
Possessed : 50% chance "Blood Golem, 50% Mechanical
Fell : Blood Golem
Macabre : Blood Golem
2.2 used shop, some examples :
Carpenter - Training Golem(one man danger room), Stapler Golem ( walking minecart)
Mason - Smasher Golem(Attacker), Living Wall(Defender)
Jeweler - Digger Golem (Oooh, shiny pickaxe hands
)
and so on
3.Used shop sets base material, body and limbs will consist of it
3.1 Anything else is randomly used for stuff like joints, organs, eyes, decorations.
Explanation Mechanical /Bloodgolems:
Mechanical Golems pretty much behave like robots, which are used by their owner(creator) like pets/tools
Bloodgolems are more like Rabbi Loews magical creature, they required a living being to die for their creation(possessed state needs to be altered for that, since it normally doesn't involve murder).
But those creatures have a living soul, and therefore act like dwarves, demons, animals or whatever was used to create them.
I know this isn't really fully fledged out, but could be an interesting approach. Any comments on this ?