Where bigger characters learn their place beneath us cute little things! This is intended for micro/macro sorts of rps, and not just "small dom/big sub" but those are fine in the "Other RPs" section.
Micro/Macro Domination: For giant/giantess scenarios in which the smaller characters dominate the giant ones. Whether it's a tiny pixie dominating a human, or a normal human dominating a giantess.
Pixies Rule: Because my species are awesome! Any setting in which powerful little magic users rule the world.
Micro Worlds: More mundane settings, probably, in which a tiny upperclass rule over the oversized plebs.
Other RPs: Anything that doesn't fit those categories!