Best:
Chu Yings character. I feel like he was the heart of the story. His character is a lot of times cute in his pure love for Go and childlike, sometimes annoying and sometimes stern. I really liked his character and it was what made me carry on watching the show.
Realistic growth. The drama shows how they grow from sometimes rather annoying characters to more mature people with life things. It depicts realistic phases of life.
Humor. I really liked the well placed humor, it had me laughing out loud.
Yu Liang and Hong He. I really liked these two characters, one bringing humor and epitome of a friend and the other just felt like a pure soul.

Annoyed with:
Cinematic angst. Some scenes/story arcs are annoying because they use the same predictable tactics to develop characters (eg Shen Yi Lang), making me feel like some of it wasn't necessary.
Story arc wrap ups. I liked but also did not like how they didn't give us closure on some character arcs.
Shi Guang: I found his character quite annoying and just generally not likable. He did a lot of things that just made me mad.
Rating on MDL. Although I find this drama endearing, I really don't feel like it deserves this 8.8 rating. Some story arcs I felt were forced because of how they used predictable tactics to create problems for characters.

#Spoilers
I wished they showed us where Chu Ying went and what happened to him. There was no closure on his character or how his journey was when he disappeared, which I think is not cool because this was just as much about his story as it was about Shi Guang.
The ending for Hong He felt so random and unnecessary. Why did his father suddenly end up like that? I feel like this was not fleshed out properly and it just sprung out of nowhere.