If you don't know why you want to attend PCOM, then how are WE supposed to know why you want to attend PCOM?
Applying to schools can be an expensive process, so I'd suggest you apply only to the schools that you'd really like to attend, and know yourself well enough to understand why YOU want to attend those schools. My reasons for going there are completely different from other students'. An interview committee, people of which I know on the committee, is going to know whether your answers to "why PCOM?" are just some fabricated "give me something unique" bologna, or if the answer is genuine. Write your own answers and have them mean something to you, or else you'll flounder around in the interview.