 If you liked Tonari no Seki-kun |  ...then you might like Saiki Kusuo no Ψ-nan |
Both consist of really funny shorts with unexpected and overly dramatic gags. Some of the episodes are philosophical in a sense dealing with people, problems of society and emotions. Both are set in a school environment.
Both are short in terms of episode length, 4 to 7 minutes. Enjoyable gags with meaning and comedic timing. Each episode can be considered an independent, so no prior knowledge of past episodes to fully enjoy the series. Both show creativity with the gags.