The similarity of the main female leads

Hi guys!

So, I am in the middle of my fifth book and I started to notice that all of my main characters (females) have a lot in common. They have different stories and different lives but somehow they end up having the same emotional background. 

 I know it's common, it's just now I am starting to think why these traits? I never made a parallel with myself but writing more and more I think that I might subconsciously write some of my personal relivings. I definitely take all the sarcastic and sharp-tongued phrases from my head because that's how I would respond but now I am trying not to think too much about the things that might be somewhere in my head that I never give a good thought about.

 Does this happen to someone else?