I listen to 90's alternative on Pandora all the time, and so much of that music "feels" Like Animorphs to me. I don't know if it's just because that's what was on the radio when I was reading them as a kid or if it just feels like the 90's, which matches the Animorphs timeline, but I really love listening to it while I'm reading the books. Especially bands like Smashing Pumpkins and Three Doors Down. Also, I know Jake likes The Offspring, which is mentioned in book 10 (The Android). Hannah and Kelly from the Hindsight Anipodcast were discussing what Jake's favorite Offspring song was. 'Pretty Fly for a White Guy made me laugh, especially since Jake occasionally morphs fly, but I was listening to The Kids are Alright and thinking that's like a seriously relevant Animorphs song.