I love lasagna but would never order it out at an Italian restaurant, I don't know why. I think it's because store bought lasagna is generally really good. Like there's not a huge difference in a Whole Foods heat at home lasagna and a lasagna you'd get at a decent italian restaurant.
I second
Gangster Gastino that if I'm at a good italian restaurant, I'll probably get gnocchi because fresh gnocchi is hard to get at the super market and it's time consuming to make it at home, so if there's a place that has a gnocchi special or something, I'll get that.
I dunno what it is but I like "Tortelini matthew," which is something that's common at a lot of Italian american restaurants in New England, it's basically just like... tortelini in a light vodka tomato cream sauce usually, and frequently with spinach. I just love it. Nothing special about it, but it's a go to for me if the restaurant has it.