.Quotes.
Orochimaru has a cool way of talking. It's a little elegant and relaxed, but ominous and even sarcastic. He's also quite straight forward and rarely leaves a chance for an argument.

 

Episode 28, to Sasuke and Sakura
"Now, let's begin the fight over our scrolls... by putting our lives on the line."
(....)
"Hehe... You can't move already? Relax, I will end it in a flash. You won't have time to suffer."
(...)
"You can't let your guard down for even a second. Prey need to strain their minds all the time and run around... in the presence of a predator."

Episode 30
Sakura: "What nonsense are you chattering about? We never want to see your face again!"
Orochimaru: "Heh... It doesn't work that way."

Episode 30, to Anko
"Are you trying to commit suicide?"
(...)
"We haven't seen each other in a long time and you're treating me so coldly."

Episode 30
Anko: "You seem quite interested in this boy."
Orochimaru: "Are you jealous? Are you still angry that I used you, then cast you off like trash?"

Episode 40
Kakashi: "What a stupid ambition."
Orochimaru: "Oh my... That was blunt."

Episode 40, to Kakashi
"You said you would kill me. Why don't you try... if you can, that is."

Episode 51, to Kabuto
"Your speculation is so good it creeps me out."

Episode 68, to Sarutobi
"Well... I sort of have a goal. If I were to state it in words... I like to see moving things. They're boring when they don't move. A windmill that is not moving... can be nice from time to time... But most of the time, it's not even worth looking at. Now I want to move the windmill with the wind called the destruction of Konoha."

Episode 69
Sarutobi: "You're as disagreeable as ever."
Orochimaru: "Now, don't say that. Don't they say that the troublemaking students are more agreeable, Sarutobi-sensei?"

Episode 69
Orochimaru: "I'm not going to go easy on you just because you're old."
Sarutobi: "I wasn't expecting a handicap. I may make you redo your training in the Academy, depending on your performance."
Orochimaru: "Please don't disappoint me."

Episode 69
Nidaime Hokage: "Edo Tensei, eh? So this kid summoned us with a forbidden technique?"
Shodaime Hokage: "Quite a guy..."
(...)
Orochimaru: "Let's stop the chitchat, old men... and let's get this started."