I don't know that I hide it, but I don't generally get into it unless it happens to be relevant. Most often I find it is not relevant. I don't much care how people see me...see me as a he? Call me he. See me as a she, call me she. See me as neither or both, go for whatever floats your boat. I've been assumed to be male a lot online.
In my day to day life, my gender has historically been somewhat ambiguous. I am afab, but I'm small chested, broad shouldered, and have a deep voice. Flip side, I have no shortage of hips and butt, and rather small framed. I'm also blunt, and masculine in demeanor, so I've been told. I get asked a lot if I'm trans. I think it can be hard for people to work gender out with me and if I'm being honest, I like it when people are confused about my gender. I get no disphoria over myself, but I might get euphoria over people not being sure. Over the last few years though, most people figure I'm female and have been calling me she. I think it's because I've been growing out my hair, but I'm not 100% on that one. I do miss people having uncertainty.