I have about three favorite quotes, all from Taking The Stone when Chiana's brother dies.
Aeryn: What happened to you?
Crichton: I had a pissing contest with Molnon... I won... I think
Crichton: So this entire planet's covered with graves?
Rygel: It's a royal buril planet-haven't you ever seen one?
Rygel: Well where did you bury your leaders on Earth?
Crichton: Just underground.
Rygel: Next to where you live? That's disgusting!
Crichton: Aeryn, what the hell is wrong with you? You are the pin-up girl for frontal assault! You should be dragging her back to the ship yourself!