It depends. Hook material is all up to the individual. The texture of your yarn will interact with the different materials in different ways. Wooden hooks will grip better than metal hooks, so if you are using an acrylic yarn that is scratchy a metal hook might be better for you. But if you are using a silky yarn then a wooden hook might work better for you than a metal one since the yarn won't slip around as much on wood. Plastic crochet hooks are in between metal and wood for how much the hook will grip the yarn.