It has been already 9 years since Lee Joon made his debut. Since then, he has experienced much and changed in many ways. In the long span of time, there has never been a rumor of him having a celebrity disease/syndrome. The interviewer brought this up and Lee Joon answered.
He said, "I really hate cringy stuff. Based on my personality, I like comfortable things and settings rather than being treated in a special way. Even now, when I go studios, I just sit and lie down anywhere. If I'm busy, I eat my meals in the car just like when I was a rookie. Just today, I ate inside the car while we were moving to another location. Also, while being in the industry, I've been hurt many times by people so I try my best to not give off the same energy to other people."
Lee Joon also expressed how he is not worried about the long inactive period he will face while he enlists for his military service on October. He said, "What's the point of being worried and nervous. It isn't something that's going to be solved anyway, I think it will just hurt me mentally if I keep thinking about it. I'm going to come out as a better person."