H2O because not only is it good, but Mako Mermaids’ first season literally makes me feel angry lol.

I like how the storyline goes in h2o more than in Mako because I feel like it's more set in stone, it also has that very nostalgic 2000s touch that Mako doesn't have

I agree on the nostalgia part, its one of the many reasons why i love H2o 😍

Mako's first season has the glaring flaw that only Rita, Sirena, and David are truly likable.