Going through this exercise, I really like jazzy, hip hop, and, sometimes, heavy metal openings. (Still get chills from Attack on Titan’s “Rumbling” OP.) I’ve hyperlinked each song below for specificity (and nostalgia).

Going back 10+ years ago: Pokemon, Dragon Ball Z, Cowboy Bebop, Gintama, YuYu Hakusho, and One Piece are the anime openings that come to mind.

More recently: Love is War, Attack on Titan, Jujutsu Kaisen, Samurai Champloo, One Punch Man, My Hero Aca, Black Clover are all top tier.

Didn’t make the list, but shoutout to Bleach for having one of the most memorable soundtracks in all of anime.