I like The Blues Brothers, but I'm not that into musicals either.
Strangely enough I did really like Mary Poppins as a kid. I was very little when it first came out, and, like the Banks kids, my dad worked for a bank in London. I also got the record for my birthday long before the film came out.
That's where the similarities ended, we lived in a bungalow in Kent, and the closest we ever got to having servants was when the cub scouts had bob a job week.