Tell the hiring manager what part of your job you really don't enjoy but be sure to avoid turning it into a negative conversation. You should always end this on a positive note.
"The part of being a QC Inspector that I enjoy the least is probably the mass amounts of paperwork that I need to complete on a daily basis. I do understand that it needs to be done, however; I very much enjoy being face to face with my team. It feels like I make a bigger impact that way."