>>9404566 I watched Diebuster and went into it thinking "Sequels are never as good."
The thing I found odd about Diebuster and which made it a little harder to digest is that looking back at it I felt like Gainax couldn't make up their minds as to who their audience was.
Diebuster 1-3 are very much not "Gunbuster 2" (despite various fansubbers and Bandai Visual calling the series that) - they're their own, very different kind of thing. They have no link to Gunbuster at all. At first I hated them, but in hindsight I can enjoy parts of them, like episode 3. At first I thought that was a shitty episode about some worthless character, and sucked because Nono didn't get the Buster Machine, but watch it again and it's really a rather nice episode, and 'Jupiter' being a space colony built inside a Super Exelion is enough of a homage to make me smile.
But then you jump to episodes 4-6, and it starts acting like a show made for people who've watched Gunbuster, including an ending that would make no sense to people who haven't seen Gunbusters end, or at the very least they'll completely miss the significance of it.