Hi Stephen, thanks for that! Some really nice chord progressions there.
Just thought I'd add that since 4th/5th chord progressions are great for creating satisfying resolution, they are a nice addition to otherwise strange chord progressions. Let's say we're playing Am-Fm. Yep, odd, but mysterious. What you be a satisfying resolution, or way to change key? How about
:
Am-Fm-Am-Fm-Bbm-Gb-Ebm (continue with whatever) * play it like Radiohead would *
The Fm-Bbm movement is a 4th (which makes it satisfying), and I used that chord to put me in the key of Gb major/Eb minor. You could continue that chord progression with almost anything, depending on the melody...
Any, just thought I'd mention it can make bad chord progressions sound good too!
James