The most typical prejudice about Jang Keun Suk is that he is very arrogant. He always looks confident and sometimes seems to love himself too much. It’s true he’s full of self-confidence, but the thing you should know about him is that he never looks down on other people. He has a very cheerful and lively personality, but he has good manners and knows how to behave properly in front of people.
Here’s an interesting episode about him. Years ago, my colleague had a telephone interview with him. I’ve had telephone interviews with some stars and it usually doesn’t take long because I ask prepared questions and stars give answers which are not so long. However, the problem was that my colleague is very talkative. She is the one who talks incessantly. But Jang Keun Suk willingly answered to her countless questions, and in the last part of the conversation, he even talked more than she did. Can you guess what he said before hanging up? He said “I feel there is something lacking. Don’t you have more questions?” Well, he is that much sociable and likes to have a conversation with other people. Oh, how long did they talk to each other? 3 hours.
Source : KpopBehind