What I mean when I refer to myself as a super sensitive person is having a highly developed, highly responsive, complex nervous system. Yes, I believe some people are naturally more sensitive than others. You know how you can change the setting on your laptop's touchpad to respond to lighter touch? It's like that. Some of us respond more intensely to the same stimuli.
If you combine the psychic concept of being an empath with the psychological concept of the Highly Sensitive Person (HSP) you basically have what I am talking about. In this chaotic world, being sensitive can be a blessing or a curse, depending on how well it is managed. Managed poorly (like I did most of my life) it can manifest as mental and physical disease, like my particular nemesis: Chronic Fatigue Syndrome. Managed well, sensitivity can be an amazing gift and make you one of the luckiest people on the planet. It can become like a super power!