Hmm, bit of a hard question since I tend to be really indecisive lol. I'd say my favorite song is probably either "The Other Side of Paradise" by Glass Animals, "Ghost" by RAT!Hammock (I only found this song a few months ago, a friend of mine linked it to me and I then proceeded to listen to it for over 400 replays over the span of a week, not exaggerating I have screenshots), and then "Ocean Breathes Salty" by Modest Mouse.
I'd say my favorite band is probably Glass Animals though, "How To Be A Human Being" is my favorite album from anything ever, and I'm not typically someone who listens to full albums!