Does the firm practice what it preaches (its values)
How commercially successful are they, not just top billers but the average and lower end of the firm.
What is the training plan for new hires and how certain is the firm of your success if you are able to complete the training successfully.
What will your contribution be? What is expected of you and is it in line with your strengths and what you want to do.
Who is your boss/ manager and do you want to work for him/ her.
Who is your boss/ manager and do you want to work for him/ her.