We all have experienced it: you meet this new acquaintance, and for some weird reason you realize you really don't like the person.
You got no real reasons to dislike him/her either, you just do.
I experience this right now: my little brother got this new girlfriend, and she's visiting every now and then, e.g. right now.
Every time she's visiting, I feel very annoyed, and I always wish that she could just get outta here; I honestly can't stand her.
Her mere presence annoys me, and the whole thing is pretty funny.
I mean, she's even hot, and since I don't know her personality too much, her hotness should give her some kind of boost towards me, but it doesn't - I still dislike her.
I think it's got to do with her incredibly silent attitude, she never says anything and never surprises me with changing that behaviour.
Anyway, that reason is not certain, it's just a wild guess of mine.
Besides, I usually don't mind silent people, as I'm pretty silent myself by nature.
I don't know why I dislike her so much, I just do.
I find this very weird, and very interesting.
Why the heck would you feel annoyed by people, if you got no clear reason?