OK, for the record, the GIRM specifies that psalms are prefered to be sung, as they are the original somgs of the church. I do not have a specific reference, my GIRM is at home right now, but I can post it later if you like.
I think questions about general familiarity with the GIRM and ruberics are great (I deal regularly with people who have no clue what rubrics even are, not just what they contain). However, I don’t think it is fair to ask about their position on things they have no control over- really, how is the music director going to keep people in the pews from holding hands during the Our Father?
Also, things like alternate psalms are allowed in certain cases. I don’t see why proper use of them would be bad. Abuse- like only doing 2 a year is bad.
Also, choice of music is HIGHLY personal. One parish I was at LOVED Haugan, Haas, et al. If you do not like one composer, etc., someone else will surely think they are GREAT.
I would ask “How do you choose music?” Whatever I like, whatever is appropriate for the readings of the day, do they even know that music is supposed to be from the approved USCCB lists, not just anything they find in a song book?