According to Interweave author, Julia M. Chambers, "The way we hold our hooks—and the reason we find one hook and handhold more comfortable or effective than another—is determined in part by the shape of our hands, the length of our fingers, and muscle memory development. Our lifestyle affects how we use our hands. Someone who swings a hammer every day will hold and use a crochet hook differently from someone who types all day. By being aware of our strengths and weaknesses, we may even be able to prevent repetitive-motion injuries.
I have short fingers and wide hands with a lot of muscle development from playing piano. When I was a child, I did a lot of hand and finger exercises so I could play an octave, because my fingers were so short. My hand-muscle development likely makes the way I hold and use a hook different from someone else who also has short fingers but does not have the muscle development I do from piano. I prefer long crochet hooks and an underhand hold."
Julia covers six ways to hold a crochet hook in her article,
Holding a Crochet Hook and with her tips, you should find a method that works the best for your hands.