Oh God, where to begin. One scene that comes to mind is the one where Dave Woodard comes to Collinwood to read her the riot act and she goes on this long, very convincing diatribe about how "bored" she is. It's really choice Julia.
I think the character was toned down somewhat after the 1795 period. There are of course still halcyon moments throughout Julia's stories. I love ALL her showdowns with Nicholas Blair. There's even a fab scene where she is visiting Joe Haskell at the hospital and she stalks to the door, clutching her gloves, shouldering her bag, lifting her chin, pursing her lips defiantly, and declaims, "It's time for a showdown with ... NICHOLAS Blair!"
One of my favorite moments during later Leviathan is when we get one last Nicholas/Julia scene, at Jeb's carriage house. Nicholas basically asks Julia what the hell she's up to, and Julia, giving him the business end of her chin again, scowls and cordially invites the warlock: "You GUESS."
G.