Tsuion, thank you. "A good rule of thumb is to have parts closer to the viewer have thicker outlines". Yes, I didnt make the hair on the second pic according to principle closer - thicker, i thought the head is a small thing to do thicker lines on the near from us
Generally it was a very informative post and I'll try to take into account in the future everything that was said by you.


Edit: Added 6th and 7th pics.