What does this mean (in question form?): so pito? (there's possibly an accent character on O in "so"? Thanks.

It sounds to me like Sa'w pito? (or Kisa w pito?) - Haitians also say Sa'w pi pito? (or (Kisa ou pi pito?)
If I'm right, then it means What/which do you prefer?

Haitian Creole ↔ English Reference, Look up Haitian Creole and English Words