When writing dialogue, which is most important: accuracy, succinctness (conciseness) or liveliness? I think that they are all important. But, if I had to pick one I would choose liveliness. This is because without liveliness the dialogue might be concise and accurate, but extremely boring and unattractive. Without liveliness readers would not feel inclined to read the dialogue. Liveliness is definitely a key to an attractive, entertaining dialogue.