Well, I guess it has to do with flow & vibe. We’re so used to 4/4 music. Calculated & within boudaries.
But when composing without a 4/4 in mind, you often feel the music flow much more into the unknown. That’s usually when odd signatures appear. If done right, you don’t really notice them; the flow seems perfectly logical.
F.e. the mid-parts of Universal Death Squad and Darkness Dies in Light. It basically wrote itself once I stopped caring about time signatures, and I just let the music I already had dictate what should come next.
