If you are going to move into Mesopotamia then you would live in between the Euphrates and Tigrs rivers.
1) If you live in Mesopotamia,the area between the Tigris and Euphrates river, it's pretty cool because you can get free fresh water whenever you want.
2) Fertile soil. The soil was rich and farmers developed irrigation systems, they also used plows for turning the soil and built levees to keep their fields from flooding, this allowed them to have stable food supply.
3) Living around civilized cultures of different people, who devolved city-states, like Empires, such as, Sargon and Hammurabi.
4) The people of this area had ziggurats which were utilized in their practice of polytheism