You only order chicken tikka masala
It's not difficult to hear the siren song of chicken tikka masala (or what my family likes to call "CTM" for short). It's creamy, with just the right amount of heat to make your tongue happy but not sucker punch it. It might be hard to hear, but there are actually better dishes on most Indian menus. Sure you could eat saucy chicken, but why skip over things like pav bhaji, essentially vegetarian sloppy Joes, or malai kofta, vegetable dumplings in a tomato-y sauce, or Goan shrimp which is made with lots of coconut and seafood? Plus, it should be noted that chicken tikka masala isn't even an Indian dish, but was actually invented by the British (which is weird considering most actual British food is terrible). How about that, mate?
You think everything is a curry
Guess what? The term "curry" is another invention for which you can thank the British. Curry is simply an (inaccurate) catch-all term for everything from meat to vegetable to lentil dishes that are both saucy and dry. And not every dish actually contains curry leaves, even though the term curry might lead you to believe that. In fact, many, like the popular "curry" saag paneer, are never made with curry leaves or powder. And if you head to a South Indian restaurant, there is nary a curry to be found on the menu.