After the death of Dobby, Harry speaks to Griphook.
Their conversation goes like this:
“You buried the elf,” he said, sounding unexpectedly rancorous. “I watched you from the window of the bedroom next door.”
“Yes,” said Harry. Griphook looked at him out of the corners of his slanting black eyes. “You are an unusual wizard, Harry Potter.”
“In what way?” asked Harry, rubbing his scar absently.
“You dug the grave.” “So?”
Griphook did not answer. Harry rather thought he was being sneered at for acting like a Muggle, but it did not much matter to him whether Griphook approved of Dobby's grave or not. He gathered himself for the attack.
"Griphook, I need to ask - "
"You also rescued a goblin."
"You brought me here. Saved me."
"Well, I take it you're not sorry?" said Harry, a little impatiently.
"No, Harry Potter," said Griphook, and with one finger he twisted the thin, black beard upon his chin, "but you are a very odd wizard."
Harry Potter and the Deathly Hallows
What is it that Griphook is not sorry about? Why did Harry say that?
I have two things in mind:
Griphook isn't sorry that Dobby, a lesser creature, died!
Griphook "enjoyed the idea of pain in lesser creatures" and so he wasn't sorry that Dobby died. (source: Harry Potter Wiki)
Griphook isn't sorry that he hates wizards! [Even after one just saved his life]
In the same source above, it says that Griphook has always hated wizardkind. And that he "was eager to harm wizards".
It would make sense for Harry to be asking, "Well, I take it you're [still] not sorry [for thinking ill of us wizards, for being distrustful of us, for wishing to harm us, even after I saved your life]?"