Just a reminder that my original post regarding resting the finger actually was:

Finally, a controversial tip for fingerpicking guitarists: DON'T rest your little finger on the face of the guitar - it restricts movement. And, YES, I know that people like Merle Travis, Woody Mann and Duck Baker rest their little fingers... :-)

I was aware that my own personal advice might be controversial - and I remember being gobsmacked when, after years of just hearing Merle Travis, I saw his picking technique on YouTube! But I don't do it myself because I find it really does restrict my fingerpicking. However, being the possessor of a crappy plectrum technique, I do tend to rest part of my hand on the guitar face when using a pick - alas!