Ungrateful Bastard: For evidence, look at the Marvin plotline. He spends the entire time being whiny and ungrateful to the people trying to help him clean up the mess that HE caused. Jules is quick to call him out on it.
Noodle Incident: When Vincent asks Mia about the story where Tony Rocky Horror was thrown out of a building for giving Mia a foot massage, Mia points out how stupid and disproportionate this is, then says that no one but Marcellus and Tony know what happened. We never find out.
Persona Non Grata: Marsellus revokes Butch's "LA priviliges", but this was a downgraded from an earlier implication that he'd be tortured and probably killed for disobeying Marsellus. Besides, he was planning to ride off into the sunset and never look back anyway, so "never setting foot in LA again" wasn't too harsh of a condition.
Throwing the Fight: Marceullus tries to make him do this. He thinks winning the fight and betting everything on himself is a better idea.
Token Good Teammate: The only half-decent character working for Marsellus, or in the movie's cast (with the possible exception of Jules post character development). He does go against Marcellus' orders and kills his opponent in the ring, though that second one wasn't intentional. He does flip-flop on the victim, since he does smack talk Floyd saying if he was a better fighter he wouldn't be dead, but also says to himself "Sorry Floyd".
Played By: Harvey Keitel
"I think fast, I talk fast and I need you guys to act fast if you wanna get out of this."
Ax-Crazy: Compared to Ringo. She's ready to blow people's heads off.
Alternate Character Interpretation: Since she and Pumpkin agree at the beginning they don't want to kill anyone, it's her act during the robbery to scare people into compliance. Note how, when Jules gets the drop on Ringo, she's panicky, crying, terrified and clearly out of her depth — but despite apparently being utterly unstable and psychotic moments before, never pulls the trigger.
Beware the Nice Ones: When she's not waving a gun around psychotically screaming at people during a robbery, she seems quite bubbly, friendly and almost sweet.
Pragmatic Villainy: He seems to run a pretty efficient criminal organization. Case in point: apparently when Vincent was acting up due to his drug habit, Marsellus shipped him off to Amsterdam for a few years.
N-Word Privileges: Although he really shouldn't have them, under the circumstances Jules lets it slide.
His wife is black, and it's implied that he and Jules go way back, so it's likely that he has enough black friends and family in his everyday life that he's been accepted into the culture and acclimated to it well enough himself. Notice how he doesn't say it in a racially insulting tone like the rednecks do, but in a more general sense.