Hyouka: Why this anime is in my head after years?

I´ve been watching anime since 2014 I started with the famous Tokyo Ghoul and No Game No Life and since then I´ve been growing up and watching more animes, but there´s one.... only one that I remember clearly with so much affection even if I didn´t LOVE it when i watched back then... it´s name is Hyouka Is weird cuz there´s a tons of other similar animes but I only remember this one with affection, no matters how many times i watched a SoL (Slice of Life) I only remember clearly Hyouka, even sometimes I forget about big animes like Fate Zero, One punch man, etc... But Hyouka is always there... in my mind, like a thought, it wasn´t my 1st SoL and it won´t be the last one but is the only one who remained in my mind even after years I´M CURIOUS