Some thoughts would be that Dinobot and Silverbolt would be into great, epic musical scores al la Lord of the Rings or anything by Immediate Music.
Rhinox would most likely be into relaxing, classical music or perhaps some lounge.
Blackarachnia is such an alternative/metal chick. I can see her tearing along on a motorbike listening to Rob Zombie.
Tarantulas would probably listen to everything and have a wildly varying taste in music. Insane people often do.... not that I'd know anything about that

I could see Terrorsaur raving along in a nightclub with his garish, red exoskeleton and glow sticks.
Depth Charge would like Metallica. Only Metallica and none of their new stuff. Don't Tread on Me would be his theme song and "....And Justice for All" will constantly be played on repeat.
Rampage would probably listen to Metallica as well, but more to spite Depth Charge than out of any real personal preference. Enter Sandman would be his song of choice.
Thats my starter.