Simple, yet complicated issue on understanding a woman?

Well my issue is, I just want to know how to understand a girl better. All I really need is things to look out for, things a girl does NOT like on any extent. Things she does like, basically things that can help me understand her and not persuade or manipulate her, but more make her say “wow, this guy understands me, and knows how I feel”, or something similar. I just need girls to respond to this, girls of all sorts, or men that might know about this. I just want to improve myself for my girlfriend.

Once again, all it is, just main things a girl does NOT like, things she likes, things she appreciates, etc. .