A few of the HSP criteria apply to me but not many, so I doubt I'm an HSP. In some situations, like sitting in an airplane, the sensory stimulation drives me nuts but at other times, I can be pretty oblivious to what's going on around me. I am pretty sensitive to reading the reactions of people I'm interacting with - overly sensitive at times - so I've got heightened awareness in that way.
The counterphobic aspects of your response do resonate with me and while I try to be diplomatic, I don't think I'm as empathetic as you are - at least with respect to the feeling powerless or subject to external forces anyway. I don't like situations where i'm subject to control of others but in the marketplace, that tends to be unavoidable.