Should I write different personal statements for each school?

It depends, but usually, no. Your main personal statement, like the Common App personal statement, is meant to be a one-size-fits-most kind of deal. You write it once and send it to multiple schools. However, some colleges have extra essay prompts or short answer questions where they want to know more specific things, like why you love them or how you fit their campus vibe. That is where you customize. Your personal statement should tell your story in a way that could impress any admissions officer, while the school-specific essays are your chance to show you have done your homework. So write one strong personal statement and save your customizing energy for the extra essays.