@HorrizonBound: checked out before, but the problem is that there is something, although not essentially being a man/woman. And neutrois has the connotation of cutting out your breasts and using non-female pronouns, which is not my thing. My approach on body is essentially different. It's an approach of usefulness and function.
And maybe it's the problem that my experience is unclear, it's a jungle of colourful stuff, but evaluating it as 'more pink', 'more blue', 'more grey', 'more nothing' ,'more whatever' is pointless. This isn't even anything. Genderqueer also carries connotation of queer - non-heterosexual, which is not me either. I'm perfectly biologically hetero. Butch isn't it too (homosexual connotation). Non-binary makes some sense as it suggests something different, but it isn't the thing either. Androgynous makes some sense, but if you could see me, I'm not androgynous in any commonly understood way. Well, actually there is a thing, but I've never met a description of something similar. And my description would be simplistic and stereotypical. Would not give the idea. Practically all attempts to define it end with a 'but...' statement.
@Asche: I'm a techie too

Music rules.
"I'm aware that other people do have some sense of a "true gender," but I have to simply accept it on faith and accept that it's something I will never understand." - yeah, I completely agree. Another description that I came across was sort of "I feel like the person that is looking through my eyes is neither male nor female".
@Satinjoy: What you have described, I would name rather 'feeling feminine/masculine/.."
To the "I am.." part. I think that as a very little child I was feeling like just me, and everyone kept on telling me that I'm a pretty little girl, pink and stuff. And I did not get it, but being a girl was not bad, because I got pink and glittering things. I concluded that girls and boys differ only by hair length, adults are silly "making" everyone into girls or boys by cutting their hair in the proper way. It was not obvious that some body features make girls and boys, because adults were small or tall, or fat or thin, or had light or dark hair, had diverse faces etc. However the person inside me remained 'just me', and always treated 'being a girl' as if I was an actor in a theatre. For the happiness of the audience. Empty. I always thought that everyone is playing. That it's a sort of game. Some girly things were very fun too. Like being nice and pretty. And pink. (I love pink still

) Physical appearance is still my favourite part of femaleness. As for the emotions, I have always been overemotional even as for a girl, but not in the sense of being non-logical. I have always been more logical than others too. The person inside is rather just 'a brain'. Or 'a human'. Or 'some intelligent being'. Like a brain put into some random body. (sf winds, isn't it?). Only a bit mor than a year ago I discovered that gendered things can feel natural and are not always acting. And I got really confused, especially as some of those things did not agree with 'girliness'.
Got lenthy. I'm ending.