Mobile Suit Gundam

Honestly the universal century timeline is overall pretty great. There's a few still during the 1 year war (0079): 08th ms team, thunderbolt, a few newer ones and also a couple pre 0079 following chars backstory and some fun cgi dealing with the tech crunch moving toward the one year war.

Then after those you have War in a Pocket immediately after the war (0080), stardust memory (0083), zeta, double zeta, chars counter attack, f91... then victory (not my favorite, overall not a bad story but oof it isn't easy to get past the beginning), then unicorn. Sadly forget the years on a lot of those, there's also a Netflix mini series after unicorn I think?

Outside the UC timeline Iron Blooded Orphans, Afterwar Gundam X, G Gundam (its silly fun, like WWE crossed with Gundam), 00, Gundam Wing are all fun.

Non Gundam mecha I've thoroughly enjoyed? Neon genesis Evangelion, Big O, martian successor nadessico, macross (another long haul series you can lose yourself in), just about any Mazinger, aldnoah zero... there's quite a few more but I'm sitting at the bar and can't even just glance over my dad's muchless traverse my watch lists lol. Enjoy your trek through a fun side genre