My friends MinaMeow and Wendy Blackheart both posted great posts on gender and queerness.
I identify as a cisgender female. As such, I do have the privilege of viewing various things that I do as “masculine” without questioning, or having others question, my gender or sex.
Gender is a social construction. Just like reality is socially constructed, gender is one of those things that, because a society collectively agrees that it exists, it exists. And, situations perceived as real have real consequences. (I love Sociology). 
I really wish our society would get away from stereotypes. Yes, I like to cook and bake, but that does not mean I am more or less of a woman for doing so. Or, if I were male, any more or less male for doing so. Just as it does not make me any more or less of a woman (or man) for enjoying sports, football, cake decorating, and sleeping.
Activities seem gendered because we have collectively decided that they are gendered. And, we have subtly encouraged females to adopt masculine activities, but actively discouraged males from adopting feminine activities. For those who question their gender, these stereotypes can be a comforting security to fit into society, and also a straightjacket that threatens to punish those who do not conform. Those who do fall outside cisgender lines face this punishment in a much more active way than those who do not. But, still, the gendered nature of society hurts everyone in society.
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I am physically obviously female, but when I was younger, I played with my gender identity. Sometimes, I liked being identified as male, just because I could then express my natural tendencies without feeling awkward. I was surrounded by adults that would tell me that being dominant, aggressive, and assertive was not “lady-like”, which are all traits I exhibit. My cisgender male homemaker lover notes that although I no longer attempt to hide my sex, I like dressing up in male-associated clothing (like hats, jackets, and ties) and take on traditionally male roles, such as being the sole breadwinner. He tells me that those traits were what attracted him to me. Yesterday, we had a lengthy discussion about gender roles and expectations; we both agreed that it’s a shame that society tries so hard to put us into little buckets of behavior and talents based on our gender… especially since we’ve found happiness and great skill in roles that break traditional gender roles.