I think you nailed it with 3 good choices for more aggressive people there. Each will have its more non-aggressive, not so ADD side as well though...like doing Whipples in surgery, long back cases in ortho, managing primary care issues for indiginent patients in ER. Of course all of those specialties will also give you good exposure to trauma and other emergent cases that need to be treated immediately and I get the sense that that is what you are after with your description. As a medical student I still think it's cool to go to the OR in the middle of the night for an appy, I'm sure this wears off somewhat as an attending but who knows.
I also think that within nearly every specialty you can find fairly aggressive practitioners, so don't limit yourself too early. In IM GI and Cardiology tend to have emergencies, as does critical care. Actually I was pretty surprised how my OB rotation was in terms of excitement, crash c-sections, shoulder dystocias, preeclampsias, all kinds of very serious problems. Even psychiatrists who do consult-liason work seem to be more like trauma surgeons in terms of personality.
In my opinion though, the ultimate job for a thrill seeker would be doing EM or surgery and then getting a helicopter job. Those guys and gals seem to really have fun and do some amazing things in the field and in the air.