IU discussed her ideal type on MBC's 'Quiz Show Q'.

On the December 7th episode, Choi Sung Joo and Lee Hyun Soo from the departments of Biochemistry and Engineering at KAIST university featured as contestants. Co-host Park Myung Soo suddenly asked IU, "Which of the two finalists would you like as a boyfriend?"

IU responded, "Choi Sung Joo is the type who has sense and makes people delighted, while Lee Hyun Soo is quiet and gentle in appearance." She continued, "For a boyfriend, I like the silent type better. However, since Choi Sung Joo is a fun person, I wouldn't mind having him as a friend."

She then joked, "So am I dating him now?" to which Park Myung Soo added, "Decide after seeing if he gets to the 7th round."