Code Geass is just a gem imo, it’s so over the top and kinda bullshit at times, but the cast of characters are so fleshed out and fun. It’s a mecha but it’s not purely about mechas so your perception was on point imo. It’s one of the few series I’ve rewatched multiple times throughout my life and I’ve walked away with new interpretations and appreciations with each run through. The overarching military parts that happen behind the scenes didn’t even really make much sense for me originally until I had already seen it a few times.
For Muv-luv: Alternative specifically:
Tap for spoiler
I believe it takes two or three episodes to get rolling, there is a big twist that takes the show in another direction that happens after the first episode. I got to see it drop live in person with the director there and everything at AX as one two/three part episode. I want to avoid actually spoilering it for you. It’s not what you’re thinking though.
Knights of Sidonia probably is better as a manga, the art style wasn’t my favorite either but the story itself was solid.
Happy to help!

