Before anything else, let me say that I applaud and admire your self-hack. What I have to say below is merely an expression of some of my personal thoughts on this issue, and is not intended as any sort of attack on your self-identity.
there was nothing intrinsically male (or female) left. I had dissolved my gender identity. Explained it away.
What do you mean by gender identity, exactly? One might disclaim any explicit, verbally-endorsed gender identity, while still retaining the psychological traits that others would categorize as characteristically masculine or feminine.
For myself, I don't consider myself to have a strong gender identity, and am somewhat repulsed by the idea that some part of my core essence is intrinsically male. Thus, it is sometimes tempting to think of myself as agendered or androgynous, but I find myself rather persuaded by intellectual arguments to the effect that it's simply not true, that as a question of simple fact, my psychology is intrinsically male, and that this remains the case no matter how I choose to verbally self-identify.
Sex isn't just one trait; it's a bundle of correlations between traits, a cluster in a high-dimensional configuration space. If I know the shape of your genitals, I can make all sorts of probabilistic predictions about your other features. The fact that these predictions are probabilistic in nature and that there are many exceptions (some men are shorter than most women, some men are gay, some men have two X chromosomes, &c.) doesn't change the fact that they are doing useful cognitive work. You can think of this from a minimum-message-length perspective: if you're trying to describe an adult human male in a limited number of bits, and the recipient of your message already knows a lot of things about humans, you can shorten your message by saying that you're taking about a man and then describing the specific ways in which the man departs from the human male average, rather than describing every feature of the man from scratch without making any reference to sex at all.
Given that gender roles in some form have existed in every human society, given that there are clear evolutionary reasons to expect the existence of some psychological sex differences due to differing reproductive strategies, and given the experimentally-demonstrable fallibility of human introspection, I'm more inclined to interpret my personal feelings of disliking gender roles as more of a statement of values and of ideology than of my actually being ungendered in an empirically verifiable sense. I don't think my mind feels intrinsically male from the inside---but it's easy for me to say that, because I don't know what it feels like to be female; any claim to androgyny that I might make could easily just be due to my ignorance of the real differences.
Thus, while I long for a transhumanist future in which people can self-modify to be whatever they want, and I celebrate and honor people's rights to self-identify however they want, I tend to be respectfully skeptical of claims that a proper degendering can be accomplished with presently existing technology.
There is far greater psychological variation within each sex than there is between the sexes, is there not? Even if the space of all possible minds from XY-grown human brains and the space of all possible minds from XX-grown human brains do not perfectly overlap, I know of no evidence that suggests that the disparity is actually significant enough to be meaningful.
Is it even possible to reliably tell the difference between an XX brain and an XY brain just by looking at the structure of neurons? Has anything ever actually been found that was exclusive to one or the other?
Upon reading Eliezer's possible gender dystopias ([catgirls](http://lesswrong.com/lw/xt/interpersonal_entanglement/), and [verthandi](http://lesswrong.com/lw/xu/failed_utopia_42/) and the other LW comments and posts on the subject of future gender relations, I came to a rather different conclusion than the ones I've seen espoused here. After searching around the internet a bit, I discovered that my ideas tend to fall under the general category of "postgenderism", and I am wondering what my fellow LessWrongians think of it.
This can generally be broken down to the following claims:
EDIT- Due to some really insightful comments;
I replaced men being prone to aggression as a negative, with men being prone to suicide.
I made the verbiage a little more explicit that no one would be *forced* to change, but would seek out the changes that transhumanism would have available.