Poor eyesight from both parents.
A 'thick' build from my Mother's side (losing weight is a *****, but it's possible. I just have to work three times as hard for a little bit of progress.)
My Mother's nose.
My Oma's and Dad's disapproving triple, "Hm,hm,hm" and moving my head from side to side. It's a noise they make when they disapprove of something. I just started doing it one day and it never stopped. Probably just from being around it so much. Like when my husband absently says, "Uff da" when he sits down after being on his feet for awhile.
My Dad's short temper when it comes to certain things. Like repeating myself. God help them if I have to tell them a third time. I can just feel the irritation building. Because if you were listening the first time, you wouldn't be asking "Wha?" and I wouldn't have to repeat myself over and over again,...
O_O;; Oh gawd, I'm my parents! *vomits and then hurls self out of nearest window*
Edit: Oh, I just remembered, the females in my family lose their pinky-toe nails after awhile. They just disappear over time. It's kind of bizarre.