Nichijou, Gekkan Shoujo Nozaki-kun Recommendations
Although GSNK has a stronger shoujo/romance feel than Nichijou, it is definitely more focused on comedy than actual romance. I wouldn't put it on the same level as Nichijou in regards to "randomness" but it has the same sort of "wtf?!" sense of humor without being crude or crass. It is a fun, somewhat simple anime. If Nichjou made you laugh, I would highly recommend GSNK.
Both are adaptations of gag 4koma manga. Nichijou had a lot of wild, unpredictable humor, and I feel Nozaki-kun does the same thing but with a focus on shoujo manga tropes. If you're an artist and liked the Nichijou episode about working on manga, this series has a lot of art-related jokes that will have you bursting with laughter. Both shows have really enjoyable, funny characters with interesting quirks!
Gekkan Shoujo Nozaki-kun happily pokes fun at the tropes and quirks of manga in a similar way to how Nichijou pokes fun at anime. Both are drop-dead hilarious, with interesting casts, and a good balance of continuous plot and random one-time jokes.