That depends on what type of things you like.
Chow Mein - noodles with some type of meat and vegetables, eg. chicken. "Special" dishes often have a mixture of chicken, beef, pork, prawn/shrimp.
Sweet & Sour (eg. chicken or pork) - often meat in batter & fried, served with a sharp (vinegar or lemon) but sweet sauce.
Crispy duck - typically shredded duck served with fine strips of vegetables and hoisin sauce, plus thin "pancake" like wraps. You put a bit of everything on a pancake and roll it up, a bit like fajitas.
Crispy beef - typically thin strips of beef battered and fried, served with a sauce.
Dim Sum - small "dumplings", little parcels of veg and meats made with small pancake/flatbread wraps.
Spring rolls - beansprouts, veg and optionally meats in pancake wraps, then cooked.
Plus rice or other side dishes.
Each dish may be somewhat different from place to place, there are many variations.
It's usually all good!