One of the mechanical bits I'm using in B&B that's been stuck in my craw the longest is Origins. Essentially, the idea is that any given PC is constructed out of three or more chunks, each of which represents a traditional character-building chunk like a race/species, class, background, et cetera. My ideal for this is that each would be structured identically so that mixing and matching was easier - you could make a Human Elf Ranger, or a Dwarf Cleric Fighter, even a Warlock Sorcerer Wizard if you wanted to. This was inspired by the Origins in Gamma World 7e.

Heartbreaker