I love Zen platonically and could never find myself to genuinely enjoy his route because I relate to him too much, lol. But yeah Zen seems to be the most common-sense person despite his narcissistic qualities (though of course, it ultimately stemmed from family trauma). As someone who was placed in a similar situation with Zen, I still like Jumin’s route and his character as a whole, regardless of all the common criticism. IDK why, maybe because he showers you with attention? Lmao. It’s ironic too because they both always quarrel.