Wrong First Impressions?

So with work, college and routine back, we are once again struggling with that yearly problem. No I'm not talking about getting out of bed in the morning, but it's just as bad.
It's the fear of making friends.
You know the one I'm talking about. The one where you worry about ending up alone for the rest of the year because the girl at the end of the room looked at you funny, or because that guy from earlier didn't notice when you purposely laughed too loudly.
Out of interest, have any of you ever taken the time to ask one of your friends their first impressions of you? Recently, one of my friends admitted to me that she thought I wouldn't like her because I seemed 'stuck up my own arse'. Now we share innuendos and flirt with each other for a laugh, even though we are both straight and one of us has a boyfriend (it's not me, sadly).
I got thinking after she said this, and I remembered how a guy in my old school had told a girl that he had never befriended her earlier because he was terrified that she would kill him, she just so happened to look that vicious and angry all the time, he was put off.
In reality, she was a lovely girl that I had a lot in common with. She didn't have a criminal record or any bad behaviour in her school files.
But then I got to the inevitable question of, why?
Why did I seem so snobby?
I was a culchie from a field in Ireland. I didn't come from a city like everyone! I came from an agriculturally based village. I didn't go to Top Shop or River Island. My mother sewed up old clothes and I hardly ever went shopping, unless it was down the road for a can of coke!
So I reflected on what I was doing when I first crossed paths with this girl, on the day of my first ever class of Sociology. What with it being a new country, and a new learning environment, I was also afraid about culture clashes and my impression with everyone else. I was so consumed with this fear that I started wearing red lipstick, curling my hair and trying to seem a little bit more...me. More than the girl that came from the middle of nowhere, and more than the girl that lived in jeans and band shirts.

I was also sitting at the other end of the room and trying to make friends with a guy, who I totally ended up falling out with anyway, so I kinda don't blame her for thinking I was some sort of pretentious bitch.
They say that the first impression happens within one tenth of a second. Which is pretty scary. But if this has taught me anything, its that first impressions are best when you look like shit, or you're wearing your oldest clothes with no make up.
Admittedly, both myself and this friend both wear light make up and occasionally dress up, but in the year we've been besties, we've both turned up in shirts going from Jurassic Park, to Ghostbusters. We are total dorks that wink at each other  and act stupid. Which is nothing that you'd expect from me a year ago if you were to see me, with red lipstick, curly hair and my best black coat, asking questions and arguing sociological problems.
Do any of you have any stories about first impressions?
Any of your friends say that they were terrified of you or found you intimidating in any way?
I'd love to hear from you in the comments.

Also, my follow up post on What's Wrong With Feminism shouldn't take too long. Sorry for that delay. I saw how much you all enjoyed it.

And another thing, you may want to keep an eye out on the blog if you watch Sons of Anarchy, I may end up writing about it, now that the final season has started, and you know how much I like me some Courtney Love.

As usual, I don't own the picture and get nothing out of it except a nice bit of colour on my page.