It depends on the story and character, but Fireball he is too human as some call him, he lives like the humans, but mainly spends time on his farm when he gets some down time.

Corrobis lives in the typical Ancient Egyptian Pyramid, but when he is with Whisper it is usually a house.

Zarrand, my main villain and for some reason people seem to like him, don't ask why XD, but he lives in his flying Fortress, doing what villains do best "trying to take over the world" XD.

Kal my Moonblade is probably one of the rare ones to live outside, as he enjoys the conditions of the whether, specially at night when the moon is up and the cool air is against him.