(Copied from the review I left on MyAnimeList)
Eureka Seven is first and foremost a coming of age story, but more broadly it's about how everyone can and should adapt as their circumstances change. It's also about mecha on flying surfboards, the horrors of war, the power of love, fascism, counterculture, Gaia Theory, the importance of family no matter its form, how you shouldn't meet your heroes, some really out there sci fi worldbuilding, and finding your first love. Even at a stout fifty episodes it's positively overstuffed with ideas, which does mean some have to be run through at a million miles an hour and arguably don't get the screentime that they should, and people coming in with an explicit desire to see a *lot* of mecha action may leave disappointed. However, all of the ideas clearly belong together and play off of each other to create the texture of the story. It's a very post-Evangelion series in much of its ideas and iconography, but is also a repudiation of the former show's crushing nihilism. The animation itself is not necessarily awe inspiring, although it is consistently good, but the designs are visually interesting and there's a very considered use of colour that means things that need to stand out, like lasers and the trapar waves which allow flight, do. The first part of the story is a bit slowly paced, but patient viewers will be rewarded with a cavalcade of "oh blimey" moments, in various forms: shocking plot twists, scenes of visceral horror, and moments of punch-the-air triumph. It is a wild and uneven rollercoaster ride that will leave viewers with a preference for more tightly constructed plots behind, but I absolutely loved it.