[Icelander]

I believe I can state with certainty that no PC in any campaign I have been involved in has ever had Incurious.

Which pleases me, as I doubt I'd enjoy a game with Incurious PCs. They'd ignore the call to adventure and heroically stick to their boring old routine, no matter what intriguing events they encounter.

I think I recall an Incurious and Unfazeable NPC butler, once. Couldn't care less how weird you were and what mysterious activities you got up to, but simply wanted to remind you that the Master expects his guests to dress for dinner.