Why not Star Wars, Marvel, Buffy or (random sci-fi project)?
Simply put, I make what I like. Most of the pieces on Inanimate Objects are DC or DC-related, but there are a few other lines represented. In a perfect world in which time, space, and money were not limitations, I’d collect a whole lot more! And customize anything that struck my fancy. Alas, I am limited by the laws of physics, just like everyone else.
Easy: A simple parts swap. Little if any paint.
Basic: Some modified parts. Mostly a new paint job.
Moderate: New and modified parts.
Skilled: Lots of new and modified parts. “Frankensteining” often involved.
Advanced: All of the above, plus a great deal of original sculpting.