For the question regarding y to come to a particular school, I normally stated that I admired the school's committment to education, research, and patient care. Also, I would go into location of the school if that seemed applicable, such as close to my home, in-state, urban/rural, etc. This was pretty much the same for each of my secondaries. But for each school, I tried to research the website to pick out something unique so at least it looked like I spent time researching the school and truely wanted to attend. But basically, its seems to be all about praising the school and stating that your interest match those of the school.