Yesterday I read an interview with someone (I don't even know who she was, actually. It was one of those one-link-leads-to-another internet wandering type things. She's someone with a nice house? Who designs things, maybe?) in which she was asked "what is your most treasured possession?" To this she replied, "my family."
I hate that.
Your family is not a possession. We want to know if you have a collection of your grandmother's love letters or a necklace you bought in Tunisia or a perfect blue lamp. Something. A thing.
This happens all the time. Interviewees, writers of online personals profiles, you know who you are.
Look. People. We assume you love your child/spouse/mother/best friend more than your vintage comic books. Consider it a given.
And now... answer the actual question.