Beauty and Aesthetic Value

Below I am asking three separate questions, the first question is just a difference in opinion. The second and third question I need some explanation as I am confused about the differences. My thought to question one is no they all all different in their own way, but I would like your opinion and why you feel that way.

Are persons, natural landscapes, and objects of art all "beautiful" in the same way?
  
Is art criticism based upon aesthetic value?  Could you explain why please.

Could you give me an example of criteria to show that something has aesthetic value.