He is so adorable and hilarious. Who wouldn't like him? The way he is ashamed of his own flirtatious words is so cute! >///<
Said everything I was going to say. Although I have to agree with the OP, the entire cast is gold. In terms of second place I'd say it's a Sakura because her reactions are so funny. And then finally Nozaki, because the anime wouldn't be complete without his trademark denseness.
Yamada2 said: Gekkan Shojo Nozaki-kun is one of those animes where every single character is likable. It's rare these days though.
This!! I'm so happy everyone gets their fair share of screen time as every single character contributes to the overall quality of the series.
If I had to chose i'd go with Hori-senpai by a small margin. I find him hilarious especially when he's annoyed and his relationship with Kashima is also the most peculiar to watch. ^^