With DNA? Sure, to some degree. You are who you are as a result of two things:
1) any information your brain picked up and how your brain processed that information
2) any impact the world had on your body and how your body is like now as a result
That basically forms you. To some degree it's DNA (like mostly how your body is shaped and how your brain works), to some degree it's the world we live in changing you.
Is it weird? Depends. For whom? For some remote indian tribes in the brazil jungle, about everything from the modern world is weird. For conservative people a lot is weird too. It always depends who you are talking about.
For modern tolerant people, it's of course not weird. Gender roles are corsets we are stuffed in from early childhood on. Some people are brainwashed into thinking that it's actually the way they are. Like, if a girl says that pink is her favorite color. It is mostly her favorite color because she was raised into thinking that, and now considers her very own opinion, while it's not. Some people obey gender roles, others don't. And roles change too. On the gothic festivals I go to, a quarter or third of the men wear black skirts. Things change, always, constantly. A century ago, pink was the boys color (because it's supposed to be a strong color and close to red), while blue was a girls color (because it's supposed to be calm and serene and gentle).
In the end only two things matter: whether you are happy and whether you reached happiness without hurting others.
Now, same as with sexual preferences, there is no real black and white. I consider my brain to be something like 70% to 80% masculine and the rest feminine. I like my male body, but I can't stand gender roles. I won't buy a woman dinner only because I go out with her. The time that women were not capable of earning money and depended on men are over. Go buy your own food. That doesn't mean that I'd never invite someone to dinner. If I know that she has no money and she is a good friend of mine, and if I have money, then of course I consider inviting her. But that has nothing to do with the gender.
I also use such gothic festivals and clubs to get away from gender roles. It's one of those subcultures were the gender roles have softened up. Just today I went to the cobbler to get my boots, that I bought last week. They're black leather boots with some 7cm heel or something, that you lace up and are very comfy and wide and such. A good mixture between the cliché man and womans boot. But I disliked the loud heel, so I had the cobbler replace the plastic part with a rubber one.
Well, so, to make it short:
Is it wrong or weird to toy with gender roles or abandon them for good? Nope, it's not. You make use of the freedom other people ignore. You explore, push boundaries, try to find yourself, whereas others are content with being what others told them to.
Or in other words: