Outside of the meme, the only people who make it their personality are generally younger and less experienced users who feel extremely empowered and proud by doing anything useful on the command line. Not like those users on Ubuntu (which they just switched from) who install stuff from a store like losers, nuh uh.
Before Arch you had the same type of people on Gentoo feeling superior because of use flags and watching hours of compiler output, after switching from Mandrake.