Male escorts are as diverse as men's sexual tastes.
Having said that, there are still a number of traits that most escorts have in common. You do not need to have all of them to escort on occasion, but you will need most to do this for a living. Here is a quiz along with a brief explanation of how each point is important. There is clearly a beauty standard in our society favoring youth. It is not critical to be young, but looking like you are under 35 is a definite advantage.