"I'm not hard to get along with"

In this quote, Jack Nicholson is suggesting that he is easy to get along with. He is suggesting that he is a mellow individual who does not trigger issues or disputes with others. Nicholson is understood for his confident and laid-back personality, and this quote highlights that. He isn't indicating that he's a pushover or that he lets people stroll all over him, but rather that he's someone who does not tension over the small stuff and tries to get along with everybody. Overall, the quote is a reflection of Nicholson's chill character and easy-going nature.