 If you liked
Cowboy Bebop
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 ...then you might like
Kikou Souseiki Mospeada
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Both are episodic sci-fi shows about nostalgic main characters tormented by their past.
Cowbow Bebop references Mospeada a lot, like in the way its episodes are titled, or with characters like Ed (acting as the heart of the group, just like Mint) or his father Appledelhi (who's basically muscle-Ray, a happy person because he never thinks of his past), and maybe even Gren (Yellow Belmont?).