Do you have a personality problem?

Origin

The man who made this line famous is Captain Lee Geun, a former member of the ROK Navy's UDT/SEAL. The line itself, however, did not come from Fake Men, the YouTube series that made him famous, but from broadcast television. On JTBC's Comedy Only, aired August 29, 2020, Lee was drilling five comedians stranded on an uninhabited island when he snapped at the comedian Kim Seong-won, who was not properly doing the water-entry drill: "Do you have a character problem?"

The humor is in the word choice. Slacking on a drill is a matter of diligence, yet the question escalates it to a defect in the person's entire character. On top of that the phrasing reads more like translated text than natural Korean speech, and the awkwardness drains the weight out of it. It functions less as an actual judgment of character than as a scolding stripped down to its form, which is why it can be dropped into any situation.

Spread

Lee's profile had already risen sharply at that point as a drill instructor on Fake Men, a YouTube series parodying MBC's Real Men in which civilians go through special-forces-style training. Riding that wave, the line spread through communities and social media immediately after broadcast and was recycled into parodies and image edits alongside his other quotable moments.

It traveled beyond television. When his possible appearance as a witness at the September 2020 National Assembly audit was reported, headlines identified him not by name but as "the 'do you have a character problem?' Fake Men instructor." The catchphrase had replaced the man's descriptor.