Dialogue
Forget the simplistic Good, Neutral and Evil dialogue branches found in games like Knights of the Old Republic. When talking to an NPC in Neverwinter Nights 2, it's very rare that your character to be presented with anything less than five possible responses. The way other characters respond to you can vary as well, depending on your chosen background.
For example, a standard fighter with no chosen background will see this:
"Ah! You've recovered my slice of bread from the bugbear cave! My sandwich can now be completed. I thank you for your assistance in this matter."
While the same character with "Ladies' Man" as their background will see this:
"Ah! You've recovered my slice of bread from the bugbear cave! My sandwich can now be completed. I thank you, you ladies' man, for your assistance in this matter."
The same character with "Troublemaker" as their background will see this:
"Ah! You've recovered my slice of bread from the bugbear cave! My sandwich can now be completed. I thank you, you Troublemaker, for your assistance in this matter."
And the same character with "Farmer" as their background will see this:
"Oh, fuck off."