Is it normal that women stare at me sometimes?

I have this done aswell. Although I am branded as a good looking person, I do not see it often. I would say the same as you, just average.

Some tend to fancy me, and some tend to, as I was recently informed, have this very "dark" aura about me. I don't know why given that I don't talk to many people.

I remember also when I would be walking and girls infront of me would look at me, then go to their friend "That's him", then smile. I think that was mainly due to me beating the "tough kid" in a fight. So my point here is maybe it has something to do with your looks or with something you have recently done that others have found out about.