Honestly, part of me questions if he is a true ESTP a lot of the time...because he is very sensitive to how I am feeling, and we often find ourselves riding the same emotional roller coaster for days, although expressing it differently. We can read each other pretty well. A lot of what an ESTP is defined by is fitting...and he does not have the "feeling" sensitivity toward ANYONE else in his life, not even his children. (and no that doesn't mean I'm saying he LOVES me more than them. We just are in tune with each other in a deeper way then we have been with anyone else). Just me. So I'm not sure what it is. We do have conflict...and usually it's because I blow something way out of proportion, and then try to explain to him in a million words WHY I FEEL the way I do...and he just doesn't see why I would turn something so small into something so HUGE. In the end though...he sticks it out til I run out of emotional energy...slowly grounding me...and we come right back to where we belong. We seem to resolve things really well. I don't ever feel like a disagreement goes without complete resolution. I see the feelings beneath our reactions, he sees the reasons around them. Together, we work through it and put it behind us. So far things seem to be going great. Although I am well aware of how easily things could go wrong. I often feel like he and I are standing in the eye of a storm...both of our worlds swirling dangerously around us...and as long as we don't step out into them, we'll be okay...
Answering this now only...
I have two ESTP brothers. One is 20, he is more introverted, the Ti subtype, and more introspective and quiet. Sometimes if you don't know him, you can take him as a natural introvert. But then unexpectatly, he sudenly flares up at times in his extroverted mode, in which he is full of the Se energy.
The other brother is only 14 years old, and he is the Se subtype. He almost seems like a abnormal child: he has a incredible force of will, and sometimes when he is in a good mood, his body and movements react as if he has electric wires in his hands and legs: every move is flexible and efforthless, cat-like, slow and graceful. When I stand near him, I can literarely feel his energy: its like it wakes me up to reality. And he is only 14 years old, I imagine how he would be at 20...
I writte this because I agree strongly with you: inside, both of my brothers are very sentimental and romantic, but outside, they have those cold, unemotional eyes, that piercing look.
My big ESTP brother has a INFP girlfriend. He treats her almost like a queen, he takes care of her, and he is proud of being with her. And also, very romantic gestures: buys flowers, takes her to a classy restaurant, and all kind of romantic sweet stuffs.
The other ESTP brother is much more interesting and paradoxical: he is very proud in his cappabilities and potential...he can easily intimidate guys bigger then him, even guys at 20-25. Girls dig him pretty much even on this age.
But on the other side, he is such a simple and likeable child. I play with him, and he just asks me stuffs that he is curious about with a simple and child-like naivety. Also, when we meet eachother, for example when I go to his school, when he shakes my hand, I can feel a very emotional and excited hand-shake, very emotional that he meets his "big brother"...exactly the feelings I had when I would meet my father when I was a child.
Both of them are very sentimental and romantic beings. And also very loving.
So, I have a "quiet force" type of ESTP brother, and a "in your face force" type of ESTP brother. Sometimes I think if Julius Caesar has some descendents in our family, because literarely I have a 14 years old Caesar brother!