I am reminded of an ex girlfriend that I had that once asked me why I liked a particular type of food. She demanded to have a reason for what I liked about it. (Let's say it was steak for example). I didn't have an answer for her and we ended up getting into a fight. I said I just liked it and I wasn't interested in defining what I liked about it and being quizzed on it. It just made me feel good to have this particular type of food.

Likewise I never question why I like big heavy machinery or constructions sites. I just do. Something about it is interesting to me.