What kind of transformation most appeals to you and how would you behave, once transformed?
There are many types of actual and physical transformations: from man to woman, shrinking or becoming a giant, becoming another creature or regression to become younger, to a bimbo or a slut, or maybe just a part of your body or physique which transforms itself. Maybe something else entirely?

Take about ten inches from my belt line and make it height. Other than that I’m pretty ok with my body.