I choose to embrace my intersex identity, because it's the only label that fit me over the course of my life. To me intersex is a congenital condition that exists from birth on. I didn't need to know I was intersex. I just was.
I prefer not to identify as transgender. It's a broadly defined term to describe anyone whose gender behavior or appearance doesn't conform to the social conventions associated with a person's sex for whatever reason. It doesn't distinguish my circumstances from others who identify as transgender. For me, the issue wasn't gender identity as much as it was sexual identity (not sexual attraction). My sexual identity is a mixture of both male and female physical characteristics -- that is, intersex.
In my view sexual identity is multi-dimensional. It has six key attributes:
1) Genetic sex (XX or XY chromosomes)
2) Gonadal sex (ovaries or testes)
3) Genital sex (vagina or penis)
4) Somatic sex (feminine or masculine features)
5) Hormonal sex (testosterone/estrogen ratio)
6) Brain sex (masculinized or unmasculinized)
If one or more of these attributes are misaligned, you're intersex. Traditionally, only the first five attributes were considered in diagnosing an intersex condition. The inability to easily diagnose misaligned brain sex is what excludes it from consideration in diagnosing an intersex condition. I think that's a mistake.
There is a reliable diagnostic test for the presence of an intersex brain: cross-sex hormones. Testosterone was toxic to my female brain. Correcting my sex hormone concentrations had an immediate ameliorative effect on reducing my gender dysphoria, a clear indication that my brain was never completely masculinized. HRT was followed by surgical alternation of my body to correct my somatic, gonadal, and genital sex characteristics to physically complete my sexual identity to be as female as possible.
At this point my gender dysphoria is gone. I identify as a woman. Still, biologically I'm intersex. Physically I will always be part male and part female, even if what's left of my maleness is invisible. My chromosomes are still XY, and I'll always have a prostate gland. But these remnants of masculinity are insignificant compared to the female attributes that now define me. Medically I'm intersex; I always was, and always will be, but socially and legally I am female. I've done as much as I can to correct nature's mistake.