Not quite sure which suggestion forum this would belong in, but here goes. Home is where the heart is. In a living space, you feel safe, secure, and cozy. You can build a home, hide in a cave, take over a fort, or simply "evict" critters from their dwellings. As I was looking at cryptids on wikipedia (fake or creatures with no proof of existence), I thought "Why not have homes made of giant dead animals?" So, here's the idea; you find a giant animal, long dead from who knows what. It's got most of its body in tact, and may be sloped along a hill. You walk into its mouth, and bam! You see a giant, empty body with bone and skin, but no meat. You set up shop, so to say, inside this beast, using its mouth and probably its posterior as doors, and you can carve out the walls for windows. I'm sure animal activists would hate this, but I think it'd be a neat survival choice. I mean, if I landed on a planet made of metal, and there was something made of flesh that was the size of a small house, I'd go inside the animal. It'd be warm.
Seconded. Or as some people would say "woot." Either way, i can't say i completely understand this idea. At first your home will be your spaceship. Then you will get a homeworld. Do you mean that in your homeworld you could live in the carcass of a giant animal? Is that it? If so, then it's rather interesting. Also, this raises another question. Could you actually meet some living "relatives" of this creature?
Trust me, no you don't. Rotting animals do not make good homes. You would literally die if you tried to live in one. Also, that's one of the worst smells known to man.
This may have also come from stories of traders in a freezing desert night using a dead camel to keep warm. A rotted out corpse would NOT be a good shelter, it's diseased and decayed... Also remember that it would probably need to be blocks like any other structure in Starbound.