Sorry if I've written something similar to this in the past... things have been so vanilla lately on the home front that it's tough to write about new topics when there aren't any new experiences.
Male to female transformation is a common theme amongst forced fem fetishists. The idea of taking a man and turning him into a sexy womanly figure as either a slave or slut can be hot, but it doesn't really do it for me. I'm not really sure why not, but I'm definitely wired differently in that regards. It might be because I'm a female supremacist at heart and a lowly male creature shouldn't be able to pass as a woman. It might be that the thought of becoming a woman's lesbian lover ranks us as equals and that doesn't sit right for me.
Overall, that idea just doesn't do anything for my subspace.
What does cater to my subspace that can be captured in this example dialogue:
sub: "why are you turning me into a woman?"
Domme: "Oh, don't worry, just because you're wearing women's clothes, NO ONE will believe that you are actually a woman."
Humiliation comes from being stuck in between states. Stripped of your masculinity but with none of the sexual allure, grace, or feminine charms of a woman. Flat chest. Boy hair. Crotch bulge. No hips. Caked on whore's make-up with a 5 o'clock shadow. Muscular build. Clothes that don't fit right.
I think my first Mistress got it just right when she dressed me up, laughed at me, and bluntly stated, "no self-respecting woman would be caught dead wearing that." She was right, I'm not a woman and a humiliated sissy has no self-respect. To sum it up, for transformation to bring on deep subspace, I have to hate what I have become... face burning bright red with shame and on the verge of tears.