There’s also the famous exchange where Jack tells Rose he’ll teach her to “ride like a man”, “chew tobacco like a man” and “spit like a man.”
In addition, there’s the famous “I’m flying, Jack” scene, although that one isn’t as much of an exchange between the two characters, as it is Winslet’s character getting excited about the experience of standing on the front of the ship rather than both characters talking a lot.
While Kate Winslet didn’t get into detail about which lines she and Leonardo DiCaprio both fondly like to throw back at one another, I’m sure you’ve probably already thought about a few that are primed for this sort of back and forth, including Jack’s “never let go,” and Rose’s response: “I’ll never let go, Jack.”