One of my pet peeves in Second Life is the skybox.
Not that I have anything against people who want to live up in the air, apparently harboring some illusion of privacy there. Rather the problem is that most skyboxes are just that, boxes. Usually just a normal ground dwelling house lifted up into the air, caught in a perpetual state of not falling.
So my most recent build, and probably what I will be working on for a bit, is skyboxes that look like they have every reason to be floating in the air.
This is my first one. It also makes a good place to dock my airship, which admittedly is bigger than it is.