Be yourself. Seriously.
If you're not yourself you are going to attract a girl who isn't compatible with who you are, and you'll be starting a relationship on a lie.
Be who you are, own it, play video games and nerd out. If she doesn't like it? Move along.
Just be yourself guys. Really. Why should have you have to change yourself? The world should simply give you whatever girl you desire simply for being true to yourself.
If I had been content with "being myself" six years ago, today I'd have been fat as hell, dressed like a slob, no friends, barely any hobbies, and too shy to even make eye contact with a girl. I'd be angrier, bitter, and a helluva lot less happy than I am now. I did hit a point where I said "screw everyone, I'm not changing for them", only to realize I had no one else behind me. Even my parents withdrew because of me pushing them away.
The problem with "being yourself" is that you never improve. Life isn't about staying in one place. You're going be forced out of your comfort zone and have do things that you're not comfortable with all the time. It's all in the effort of continually getting better. There is no static "you". You're a culmination of all your ideas, thoughts, and experiences, and it changes everyday.
Good things in life don't just happen effortlessly. Your dream girl will not fall from the sky onto your lap and start blowing you if you just "be yourself" and wait long enough. Your perfect job will not come knocking on your door with a complimentary Maserati with a built-in jacuzzi because you are who you are. It's not other people's job to recognize how amazing you are and give you all the things you want.
You must
make people realize how awesome you are and get the things you want for
yourself. If someone doesn't like you, fine. Consider if there's a valid opportunity in there for improvement, and if there is, you take it, and if not, shrug it off. But please, do not stagnate.
Sorry that just completely blew into something else, but "be yourself" is another one of those vague feel-good BS slogans that I get tired of hearing because I have no idea what the hell it's supposed to mean. The overweight balding dude with a porn addiction and go-no-where job will never land that ex-Olympic athlete gone full-time model by "being himself", not in million years. Extreme example, but almost everyone wants the absolute best-of-the-best, yet most settle for being the average "be yourself" people no one cares about. They then end up settling for mediocrity and become those unhappy middle-aged couples wondering what happened.