I'm not sure who does or doesn't use that term "repetition structure" to refer to what I'm thinking of, so in case I'm completely clueless about what it's really called, I'll try and explain.
By "repetition structure", I mean the traditional ABABCB flow of songs, A being a verse, B being the chorus, and C being the bridge. This is something I commonly see with songs with vocals in them.
Now obviously there are no "rules" in writing music, just guidelines. But for some reason, I tend to write my instrumental/video game music with the same or similar structure; except of course, instead of verse/chorus/bridge, it's just part a/b/c. It seems to work for me.
However, when I listen to a lot of the music here and in various video games, I tend to hear setups more like ABAC, or even just ABC. A lot of electronica doesn't even have much repetition (relative to sections of the music; of course though there's generally a lot of repetition from measure to measure).
My question to you is, what is the repetition structure you tend to use with your instrumental/video game music? Any other insights would be helpful...and useful for discussion, etc. Do you think there needs to be any sort of repetitive structure in most music?