Body type not a factor.
Age is not much a factor, but experience is--much prefer very experienced and do tend to like older.
Media posts and the like can pique interest, not a determinant.
A professionally done website is a plus.
Not interviews, but tryouts.
I do some research and ask people I have seen for their suggestions.
I have tended to prefer longer term relationships, but have seen different people when I have travelled.
I am loyal and usually ask permission to expand my horizons.
Higher rates can be an issue.

What is the key factor in whether I choose to try to see someone is information on what sessions could include.