@Sing4me88 - I agree, I'm also camped in the the 'brilliant' side of the field, I tend to think that one is bound by the rules of music theory as to what can fit, but as you know I don't really play by the rules, so this is food from heaven for me.
I'm working on a piece with this structure, got the riff, now working on the Verses, and as it can be free form, I'm wondering about a Bridge and or Choruses, my instinct tells me both, as the riff is constant, and it'll add contrast. I'll also add, as you say, contrast in other ways, might even be a tape stop, perc, mangling of instruments, reverses etc.
I'm loving it.
All about U - by 2Pac is an example of the idea...