Eh. Not really a fan. I like straight up physical transformation, where one finds themselves in a form unlike their original. Sissyfication doesn’t really scratch that for me- it’s mostly surface, and everything underneath stays the same.
With a true, physical transformation, there is no escape of your new form. It is who you are now, no question about it. How someone reacts to that, or how they react on the way to that form, is what really gets me going.