When it tries to be serious because the serious scenes are either ruined by having no build up (Asia's fake out death in episode 5 and basically anything Asia related because she's the least likeable female character with a full name - I personally don't like her) or ruined by "comedy" (retcon of the last 4 eps of season 3 when they resolved the issue with Oppai Dragon song).
Most of it just isn't memorable.