Odd question I know. I ask it because business is like dating. Whether you are entering into a client/vendor relationship, an employer/employee relationship or a partnership arrangement there is a process to go through to be sure you are marrying the right person.
People are who they are. By taking the time to build the relationship you can determine whether it really makes sense to cement the deal. So, don't hire someone off the bat. Don't sign a partnership agreement in the height of the moment. Don't take on a client because they SEEM to be the ideal customer.
Do yourself a favor and take the time. Think of it as dating and marriage. Do you want to be with this person for eternity?