Depends how your stomach is.
Avoid things that usually give you gas, bad breath, upset stomach, gas, gas, and gas.
Avoid things you aren't familiar eating. If you don't know how to eat lets say dungenous crab, then don't! You'll look like a fool. But it has its benefits. If your date also doesn't know, it could be a learning experience for both.
But just use common sense. If you're a messy eater, don't eat messy foods. Avoid eating foods you eat with your hands if you aren't an elegant eater. Would suck to get ribs all over your clothes on a date.
I'm a sometimes messt eater (drop food on my clothese once in a while) but on one of my dates, I decided to go with ribs. Had sauce all over my face and some drippings on my clothes. She thought it was cute that I could eat like a kid and was open in front of her. Plus for me, but not for all.