I have a few favorites on Tattooine. On the republic side is one that goes something like:
Soldier 1: Did you know that on other planets the weather actually changes? Like, sometimes it's cold, sometimes it's hot...
Soldier 2 (sounding thoughtful): huh
Soldier 1: Really.
The other is on Empire side and it involves some grunt chastising an officer for using more than his share of water rations. The officer is all pompous and indignant and goes on about how the heat makes him sweat and says, "I'm willing to compromise, but NOT when it comes to personal hygiene!"
I think what makes these so funny for me is the tone of voice used, which is hard to convey in a post.
I know I've got a few others that I always stop for and listen to if I happen upon them.