I think saying that you are cute, smart, and will be a darn good pharmacist should suffice. Unless of course, you are not one of those qualitites.
My real advice is to keep putting words on the paper. Use a mixture of things you know the admissions committee wants to hear and things you feel are important for them to know about you. Everyday reread what you wrote from what a adcom person would think of your essay until it's where you want it to be. An average personal statement, in the minds of the admission committee, is probably not that bad of a thing. I think it just needs to be on the same level as your grades, pcat, interview, etc. I think they look for consistency across the board.
Hope this helps!