 If you liked
Top wo Nerae! Gunbuster
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 ...then you might like
Uchuu no Senshi
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This recommendation seems like it makes no sense, but there is logic behind it. If you're one of the people who really enjoyed Gunbuster's high-school/boot-camp arc, and for reasons other than the bath scene, then you'd probably enjoy Starship Troopers.
It dedicates a good 5 episodes to Johnny Rico's training in power armour piloting, and plays out remarkably close to the book.