Hmm. Most original? Ones I felt broke away from the pack the most?

I'll start with The Dissident's Basilica. A purely covering, supporting frame, inspired mostly by the Necron Monolith.



Tiamat/Hydros/IjadTiamat. I'll group these all together for obvious reasons. This was my first real departure from Chub-mods, and eventually morphed into its own line of variants. Among my oldest frames.

The RS-29 "Mongoose". Remains my favorite, and most original to me, digitigrade walker frame.

The RS-57 "Damascus". This is one of my most recent, but it also marks my first real attempt at an "armless" frame. It'll be hard to ship it to its new owner soon.
I don't want to flood the thread, so I'll stick with those 4.