The idea behind HAPI themes is to embellish those humanistic qualities extraneous or, if not extraneous, at least somewhat aft of the Engineering focus. Being a secular humanist, I often delve in philosophical readings: mainly Kant, Collingwood, and Plato. When I read philosophical finding I am therefore in my HAPI mode. This isn't to say, as I have learned from a previous study in logic, that philosophical reading aren't the only things that trigger a HAPI state.
Though an engineer, I also find the need to watch the news every day and look at Wiki and Wikileaks articles on the daily. Perhaps its my love of, what the philosophers deemed as wisdom which makes me stay so in tune with the world. I simply love to learn about things both pragmatic and concurrent as well as the useless and the abstract. The truth of the matter is that learning is my favorite thing to do. I don't watch much TV nowadays though I used to for very elongated periods of time.
Perhaps the HAPI theme that is most relevant to my major is my fascination of the unknown. As an Aerospace Engineer undergrad, the idea of the last frontier has always fascinated me. I figured such a major would allow my curiosity to be peaked and intrigued. So far I have not had any doubts and I am currently focused on my school life.