My wife and I have talked about this and we each behave in ways that are fairly congruent with our biological sex, but neither of us feel male or female. We're both just feel like 'me'. I think for most cisgender people the 'neither' category could also have 'generally no feelings at all', or 'mostly invisible', because their gender identities and biological sexes match and are essentially two forces pushing in the same direction.
I'd like to submit an alternative to the hypothesis that everyone has a gender identity. The current TRA position is that everyone has a gender identity, but most people just aren't aware of it. As an alternative, I submit that most people do NOT have a gender identity, and that only a small number of people develop one.
I submit that you and your spouse, as well as me and my spouse, and many people in this thread do NOT have a gender identity, because society's sex-based stereotypes aren't a significant part of our identities.
First, let's talk terminology. The first thing I want to do is to make the distinction between
identity and
identification.
Identification in this context refers to the ways in which other people can tell that you are you. This is very often related to the information on various identification documents - height, weight, age, hair and eye color, sex. But it also refers to other physical characteristics, like body and face shape, voice tonality, even fingerprints. To some extent, identification can also extend into behavioral and personality characteristics, things which aren't obvious but which can often be observed nonetheless.
Identification is how you could tell me apart from Thermal if you stood us in a line-up... but it's also how you can tell whether it's me posting or Thermal posting, even if there's no name attached to the words - we have different styles, different ways of expressing ourselves, different word choices, etc.
Identity, however, is an internal framework of how we view ourselves, and often how we want other people to view us. This frequently has a lot to do with our accomplishments, what's important to us, etc. For me, this includes things like... health actuary with a ton of experience in the individual market, intelligent and good decision-maker, able to lead a team of people to success, accountable for my decisions and actions, logical and pragmatic, considerate, etc. It's also shaped by things outside of my control, but which have a considerable influence on my life. I'm epileptic, I get migraines from chocolate and pineapple, I have several alcoholics in my family. To some extent, the fact that I'm female has exerted a lot of pressure on my life, and it's an inescapable aspect of my identity... but society's stereotypes and expectations of my sex are NOT a material part of my personality.
I think that the vast majority of people do NOT have a gender identity, because gender (society's set of expectations and stereotypes based on sex) are not part of what we view as important about our personalities. I would submit that the only people who have a gender identity are those people for whom gender is an important element of their internal identity schema.