These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Eureka Seven
Arc Fatigue: The Mine Arc, where the crew is trying to repair the Gekko, which ranges from roughly Episodes 15-20. Most of the episodes include a lot of Angst on the parts of Renton and Eureka and Holland's abusive behavior towards Renton reaches its upper limits. Fortunately, the Charles and Ray Arc begins almost directly after, which is where the series begins to pick up in steam again, which it manages to maintain for the remainder of the plot.
Complete Monster: Dewey Novak. He doesn't care about anyone, pretends to like Anemone so that he can use her as a tool, and sacrifices civilians and his own soldiers alike to test his weapons against the Scub Corals without any remorse. It is revealed in the end, that he just wants to destroy everything, humans, Scub Corals and the world itself out of some sick sense of pride.
DAYS has a pretty sweet remix on the movie's soundtrack.
"Niji" (Rainbow), the song that plays during the Nirvash's last evolution and the ensuing final battle definitely counts.
The second opening, "Shounen Heart", is notable for being so gosh darn happy. Then again, given that it's by HOME MADE Kazoku, this is little surprise. Bonus points for appearing in Ouendan 2 and whatever this is.
Dude, Not Funny!: The abuse Renton goes through at the hands of his own comrades.
Everyone Is Jesus in Purgatory: Played with in the soccer episode. Norb says they should play soccer and several people ponder why they're playing soccer. At the end, Norb says something along the lines of "If you had fun, that's good. If you learned something, that's good too."
Movie!Hap and Movie!Stoner hold down Eureka and rip her top open. What makes this worse is their apparent motivation for doing so—they were concerned about their reenactment of a myth (you know, those typically orally passed down and allegorical stories) not following the story to the letter.
In "Paradise Lost", Renton struggles with the idea of addressing Ray and Charles as his mother and father. ...anyway...
Charles:(embraces Renton, shoving his face into his own chest) "I worked up a sweat at the gym just now. Do I smell bad?" (Renton looks up at Charles and shakes his head) Charles: "This is how your dad smells." Renton:(tearfully) "It really is a good smell..."
In "Wish Upon a Star", Renton grabs a flower that (presumably symbolically? The ending is a bit strange) appears in Nirvash's cockpit. As he does, there's a "ding!" sound effect like he just picked up a video game powerup.
Even the extremely silly and hammy Charles and Ray still work in context given by the time Renton meets them, he's become a fullblown Emo Teen and they're the first people to treat him kindly in years, turning the Narm into a Heartwarmer.
Never Live It Down: Okay, Holland is a total prick to Renton in the first half of the series. Some people seem to forget that he grows out of it in the latter half and claim he remains an insufferable douchebag throughout. This attitude seemingly stems from the fact quite a people would regard physically assaulting a child just once hard enough to live down. Holland attacks Renton on multiple occasions.
Replacement Goldfish: It can be argued that the Beams, who were unable to have children of their own, saw Renton as this.
The Scrappy: Those Goddamn kids. Linck in particular. They cry in almost all of their appearances, are completely spoiled, and their continual cries of "Mama!" can become straight up the Most Annoying Sound in the series.
Maurice shows his Scrappy colors later on, when they're lost on Earth. "Only love me, mama! No one else!" And then Renton and Eureka just have to go and be so damn understanding about it.
To be fair, they are kids. They're away from home, in an unfamiliar place, and their "Mama" is undergoing strange, hard-to-understand (for a kid) changes. There's also the whole part about Eureka being their only caregiver after their parents died by her hands.
Holland's general treatment of Renton during the first half of the series is down right brutal at times. The fact he uses Renton as a punching bag on multiple occasions, basically taking out his own inadequacies on a kid, is enough on its own to be loathed by many fans.
Most of the Gekkostate members get this treatment due to their cruel mistreatment of Renton.
Take That, Scrappy!: Whenever Talho slaps Holland, you can hear the sound of cheering around the world.
Tastes Like Diabetes: The ending could cause you to go into insulin shock even if you're not diabetic.
Wangst: Renton for around half of the first episode. Stays in sight for a while before it evolves into genuine Angst and then disappears.