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Black used to be considered formal/severe and too standoffish for an interview.
It's sort of like skirt suit vs pant suit for women, while some people still consider a skirt suit a safer bet in a conservative environment, it really is a matter of personal preference and is pretty far down on the list of things to nit-pick about.
Loafers vs lace-ups is another "hotly" contested interview fashion item.
Black is still to formal for an interview.
Loafers should NEVER be worn to an interview. Balmoral cap-toe lace-ups are the only interview appropriate shoe, a punch-cap would also be fine. Anything other then this would be considered to informal for an interview.

