Growing up, "Chinese food" meant appetizers! Chicken wings, pork strips, egg rolls, spare ribs, fried shrimp, chicken fingers, beef teriyaki, dumplings. I'm sure we'd have had crab rangoons if we knew about them. We'd also get pork fried rice, egg foo young, lobster sauce, and beef with pea pods (for my mom). Man, those were the days!
Now? Hmmm... probably pork egg foo young. Not very sophisticated, I know, but I do love it. I also like Moo Shu Duck (shrimp, chicken, pork) a lot. Let's face it... I love almost all of it, but you asked for my favorite, so egg foo young it is!
ETA: Cold sesame noodles!