If you interview 6 or more applicants in a single day, it is easy to have them blend together. What makes you memorable and unique or unusual? Are you the only one I interviewed today who was born on leap year day? the only one who was a member of your college marching band? have you participated in an unusual sport or done research in an unusual field or lived in an out-of-the-way place? I would think that this would be something to talk about. Alternately, this may be a time to blow your horn to talk about something that is unusual or unique and impressive and would make the interviewer say to a colleague, "wow, today I met a guy who...."
was an EMT at Ground Zero
is a triplet whose spouse is a twin
was a hot dog vendor at a major league ball park
has a PhD in biochemistry
started doing DNA sequencing while still in high school
has never eaten at McDonalds
If those were the 6, I had interviewed, I think that I would remember them all as unique individuals.