Inspired by Robbaz's head collection, I decided to renovate my home into a morgue. Unfortunately, most of the corpses seemed to disappear. However I know for a fact that there are some corpses in the game that stick around.

Can someone clarify this for me?

I got no idea other then those two dead draugr by the morthal hearthfire home. I think after a while bodies will be automatically deleted by the game. I could only imagine the file bloating if they didn't.

Ohh. True. I forgot about the crazy amount of the lag that would introduce.

Any other tips I can use to turn my Orcs home into a hell house?

Some key bodys stay for some reason. like the first 2 thugs in the ratway. I never saw them disappear.

Find a lot of skulls, and big axes and claymores ..... thats all i could think of

Skulls would become tedious. But I like the huge weapons idea!

skulls are not to hard to find. of course off the top of my head I couldn't tell you where to begin looking. only that I seem to come across a couple in troll caves or draugr crypts

Anise never seems to disappear for me. I use her cabin as an early game home on my console saves, hide her body in a nearby tree...level 63 and she's still there...

The cultists who begin your quest for Dragonborn also never seem to despawn for me so I have two naked Dunmer chilling on Hods mill

If You have the patience to colect them, many bodies remain in the World, Hunters, Bandits, and Dunmer Alchemists. Getting them to a Home may be problematic, but the Ritual Stone can be exploited.