Yes it ended so abruptly didn't it
even though you knew it was about to happen.
I liked the end, it was just like I wanted it. But there were some things in the plot I feel they just left off:
Spoiler
Nakai was a quite important character throughout the series so they should have done at least someting about him before ending.
Also the rivalry between editors was left off completely.
And to leave out Nizuma Eiji completely although he was the most popular character...!
People are already talking about favorite parts and memorable moments and such.
I think what I liked the best was the plotting and hardships in the beginning of the series, and also how they changed Hiramaru into a funny character
Some moments I remember: Aoki holding out the umbrella over Nakai. Nakai returning from his hometown, even fatter than before. Nakai and Hiramaru getting drunk and ending up working together.
If i was to pick an overall fav character I'd say Hiramaru.
Although had these people been real, irl, Moritaka is probably the guy I would have liked.