There is definitely a before and after watching Merlí in my life, or plenty of reasons.
First of all, everything on it -but Merlí itself- It's completely down to earth and very easy to identify with, both characters and plot. There is no quest, no good and eveil, no heroes and villians. Merl'i is about ordinary people struggling with problems of ordinary life (and not for that easy). Characters are deeply developed, with complete absense of stereotypes, and yet, we all know a Pol, a Berta, a Tania, a Bruno. We also know someone dealing with financial problems, or whose parents are getting divorced, or that feels very unsure of their sexuality: Again, all people and problems that hit us just in our heart, because this sh¡t happens to us and in the end, it's what life is about.
Merlí himself is the only extraordinary aspect of this show. An unorthodox, rebelious teacher that gets his pupils to really do philosophy. Not just learning names and concepts by hard, but actually thinking, questioning and approaching their daily life from different angles. He is in some way similar to Mr. Keating from the Dead Poets Society (actually the whole show is a bit like the movie). Plus, he has many flaws, what makes him an ordinary man, although he is one of a kind. Each episode has te name of a different philosopher or school and explains basic concepts to us mortals who never read any of that before. It hooked me, and now i'm interested of learning more of it.
I felt over and over reflected in characters, relationships and situations in a way that touched me deep inside, as very few books or movies did before. Everything in this show seemed very real, very close to me and very dear. It made me feel i was a teenager again and I started re-thinking many questions we usually ignore. What am I doing with my life? Am i happy with myself? Should i settle with my reality? And on and on. I really wish i could time travel and show this series to my 17 year old me. I would have bolder and crazier decisions, but i would have been happy too. As Thoreau said "and not, when i came to die, discover that i had not lived"