Dear Ben,
What an interesting question ! My little fingers are fairly straight. However - though I've never noticed it before - the middle finger on my left hand turns massively to the left from its base. When I hold the hand up, and look at it, the middle finger and the one next to the little finger appear as if they were actually joined. (They're not, of course.)
I'd be interested to hear if Terry and Geoff have a similar displacement. My configuration, however, may be due to the fact that I used to play the piano a lot when I was young, and used to do most of the work with my left hand.
Best wishes,
Paul