If you loved Turn A Gundam II: Moonlight Butterfly, try Turn A Gundam I: Earth Light
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

Turn A Gundam II: Moonlight Butterfly
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Turn A Gundam I: Earth Light
What they share
Both films are directed by Yoshiyuki Tomino, and they sit in Animation / Science Fiction territory. If that's the register that drew you to Turn A Gundam II: Moonlight Butterfly, the second film will land in a comparable space — through a different lens.
What Turn A Gundam I: Earth Light is
Cowboy Bebop meets Pacific Rim without the cynicism. A lunar scout sent to prep Earth for invasion instead falls for the planet and its people, then wakes a colossal ancient war machine when hostilities ignite. Quiet idealism wins the day, carried by a soft-spoken teen and mecha older than memory.