You just don't know me

People tell me I'm mean, and weird, cause I usually sit by myself, all quiet-like. I'm not mean, really I'm not. But people say I'm mean because I don't indulge in yelling my lungs out and acting outright idiotic. Like I say in the picture, I'm not mean; you just don't know me.
 
(Ah, yes, and fear my horribly drawn rain.)