An odd problem I've encountered deals with the body types of the various player races. I think I have to steal the body type of one race for another, but then that leaves the body-less race...well, body-less. At least until I can figure out what their body looks like.
You see, I went out of my way to make each body type somewhat different yet still have common traits that players can identify with (meaning they all can run, climb a rope, jump a pit, etc). I also tried to design in some internal consistency and logic, such as the Foibles being able to braid themselves arms and legs since they're little more than balls of hair.
The problem arose with the Phleem, a race that evolved (in a manner of speaking) from human snot. You know all those boogers little kids leave stuck under chairs and tables? That's where Phleem come from. Anyway, in an earlier draft I went with them looking like human noses with arms and legs. I know, I know, I thought it was funny at the time. Upon reflection it didn't make much sense, considering how the other races are built, plus after drawing it a few times it looked really stupid.
After thinking about it some more, I felt the best choice was the sluggy-body-with-arms look of the Hutts from Star Wars would work, plus it was a bit of a nod to the Dralasites of the awesome old-school game Star Frontiers. The problem with that, however, was that shape was the body type for the Mumbles, a race of hive-minds formed from dried human skin cells and dust mites. So the Phleem had a makeover, but what do I do with the Mumbles? They could be sort of cloud-like, but that makes it difficult to role-play and I'm asking the audience to suspend belief enough as it is.
So...What does dust do? It sifts down and settles on things, and in a pile it's sort of silky, with no rough edges. This gives an unfortunate image of the Stay-Puft Marshmallow Man, which I'd like to avoid. I could make them a swirling cloud, but to move about they'd have to levitate and that's one Hell of an advantage. Another idea is a form of containment or envelope for the dust, but that would be hard to explain and it doesn't feel right. I might make a "binding agent" out of static electricity (which has both advantages and disadvantages), but I'm still at a loss as to what their basic shape would be. The standard humanoid bipedal body-type is a decent fallback, but I'd like something a bit more unique. I shall have to roll this about in my head and see what I come up with...