Questions to ask a mortgage broker

Tell me a bit about yourself and how you became a broker.
How long have you been in business? Do you take a long term view with the business?
Are you independent or do you prefer to deal with only certain lenders? Why is that so?
Do you disclose all your commissions?
Are you a lender yourself?
How many investors do you deal with?
Are you an investor yourself?
Do you deal with both residential and business loans?
Do you have any experiences buying through a trust/company trustee structure?
Are you a member of any professional mortgage associsations? (MFAA?)
Do you have professional indemnity insurance?
Do you have any references I could call?