see, that's interesting. My therapist never liked the word "transsexual." Even the DSM V is incorporating "transgender" along with "transsexual."
I have to admit, I don't like "transsexual" much either. For me, you have homosexual (same gender love), Heterosexual (opposite gender loving), bisexual (both gender loving), Omnisexual (any gender loving), asexual (no gender loving)...based upon the logic and definition of these words I believe they chose "transsexual" poorly. Because if we went with the flow of the previous words and terms then that would surmise "transsexual" is (switched gender loving). Hence, why my doctors stayed away from it.
But all in all it's just a word. I go by female. If i had to chose one for medical reasons, I would chose transgender.
If someone else chooses transsexual, that's cool with me.
I think the important thing is not to laud a particular label over anyone's heads. Let each individual decide which is best for her or him.