Eating speed.

[x3 thisismysn x3]

I always end up dropping half of my food on my shirt, so I tend to eat slower. sweatdrop  

[TomorrowIsAFish]

I don't eat my food. I inhale it. I'll have finished seconds before my father is halfway through firsts. (Though I don't take very big portions.)
I can finish a Philly Cheesesteak Burger in about a minute.
People give me weird looks, like in Scooby Doo and the Cyberchase where Shaggy and Scooby are eating in the cafeteria and people around them leave because it's gross.