Do you have a recommendation to why should people watch K?
Including my description above i would say that people who liked Durarara and Baccano will definitely like this anime. It radiates the same vibe and thrill as those two great anime. Its slow at first with little back story to hook you in to see what connections the characters share but it does eventually picks up some pace and you learn about all these mysterious characters. I do find it necessary to repeat that the Animation of this anime is breath taking at times and the visuals are on the same level. The colors practically bleed from the screen, which can be annoying when the "blue" becomes overwhelming, but usually its a welcomed effect.
Other Anime that i like this Fall are Shin Sekai Yori (From The New World) and Tonari no Kaibutsu-kun (My Little Monster). The later is a weird pick for me since its a Shojo anime and i am a male. Its actually quite amusing to watch and kinda relaxing since its not hard to follow, its not great but it is funny. My other choice is one that i am in love with and more suited to my preferences. I want to watch Btooom! and Robotic;Notes but i am in the middle of my Uni exams and i find it hard to study whlist following several anime at once.