All GMS. All the time.
Fun fact: I have all of these that I'm going to list on my MP3 player.
Another fun fact: I listen to these while doing yard work on my wireless earbuds. Don't judge.
Momiji No Sakamichi. Mained a hayato back in GMS on El Nido, which then became GAZED. And then GRAZED. And then god knows what it is now since I stopped playing GMS but I used to sit on my 200+ Hayato on Maple Hill Road 1 on his lvl 200 horse mount just hanging out listening to the BGM, watching other low-level Kannas and Hayatos do the quests there, sometimes even pitching in to help them get the etcs. Good times.
Next up: In All Verity. Don't like Xenon much, but I'm a fan of the super secret agent-like music. Compared to the rest of Aquarium and the cheesy old nostalgic "watery" music, having a nice modern theme in that area, Veritas, is a good change of pace.
We got both of these areas in progressive already (woo!) and in case you haven't noticed, I like the modern, fast-paced, edge-of-your-seat action music. Here's another one Croosade already has. This one is probably my favorite of all time. Yup. Mole King Rises. It's a shame this theme is only used as the insanely easy boss battle at Ellinel Fairy Academy for what it is, but this one is my absolute favorite. I quit GMS before more content was released, so no idea if they re-used it anywhere, because frankly this fits a more "battle to end all battles" theme. The dark synth solo and the guitar solo... *Chef's Kiss*.
And, to be a hypocrite since I just said I like all of the fast-paced stuff, I do. In fact. Enjoy one more, and that's only because it's chill as fuck. A good song to just take in after a crazy grind-fest or just to relax. Good old Skyscraper. Didn't care much for Kinesis either, but loved the music. (Whenever Croosade gets this update, whenever that may be.)
Alright. I think that about wraps it up.