I like wooden handles because they do not feel as slick when wet...like the SOC above. I know I posted this pick before but it is the best one I have with my favorites
I think this one is my favorite handle shape. It fills the hand, feels good and is tall enough to keep most the lather off my hand. After the attached pic, my next favorite is the Rooney 3/2 handle. It is just comfortable for me.
I have never really paid much attention to handle shape other than the fact I am happy my lather comes from a puck or a tube instead of a can in the hand!