Nothing really. Maybe save for a well animated show.
- Renton BAAAAAAWs a lot, but he isn't really that annoying. He's actually a pretty cool protangonist in the end.
- Eureka didn't do it for me. She was as fucking boring as a rock. Of course Eureka Seven fanboys are generally the type that can see no wrong with this show (more so than other shows I think), so you're not going to get much of a decent answer from them.
- The children I wanted dead.
- Lame villian is lame.
- Side characters are pretty cool.
- Overall good show, but you're not missing much if you don't watch all 50 episodes.