Mob Psycho 100 is written by the same mangaka of One Punch Man, ONE. That doesn't say much, because what matters is who adapts this story rather than knowing the original creator. Madhouse did a very awesome job at adapting One Punch Man, but I think the best possible case of adapting ONE's story has been done by anime studio Bones.
This comedy anime started as a pretty nice slice-of-life adventure of Mob and his spiritual mentor, Reigen Arataka. We see how they do their exorcism job and their daily life, all filled with misfits traits of these duo . It's cool to see something actually takes it pace slowly before building up until the end.
And what I mean by building up is still not something that grandeur. The show still makes fun of self even at the finale, but at the same time still weirdly conveys a good message such as lean on to your friends and how to accept reality as it is. Reigen is still so light-headed as usual and maybe one of my favorite character throughout my watching history. My only bother with the whole series is when the side-plots are concluded in such a brief manner, but still, I have soft spot for the character progressions shown in the epilogue.
Throughout the series, besides seeing Mob and Reigen being funny, we were also introduced by characters such as Ritsu, Ekubo, and Teru. They have their own episode to actually construct their characters as why and how those people were made that way. To do this in 12 episode series needs a pretty good insight about the story, in my opinion.
All and all, even when it ended conclusively, a sign of wider plot was projected at the finale episode. While OPM got their second season, I also want to believe that this underrated anime was appreciated enough to get its sophomore season.
Funny dry jokes, sensible characters, and mix of pretty creative artwork are some of the reasons of this anime's greatness, but the most importantly is how they adapt it into something that feels coherent and to make sure that most episodes do really have point instead of just fooling around with the gimmicks.