Author's Note: So, this is my first story I've ever published anywhere. We see that music has such an impact on Dean. He so often makes fun of Sam't taste in music, but we haven't really had any chance to learn what Sam listens to. So...here is my take.
Potential spoilers for 11.04 "Baby"
The chorus of Led Zeppelin's "Ramble On" thundered into the main part of the bunker from the garage. Sam had no idea how Dean could listen at that kind of volume, but it seemed to make his brother happy. Leaning against the railing at the steps into the bunker's he watched as Dean slid out from underneath the black car and wiped grease from his hands with a rag from his back pocket. The Impala had been more than a little beat up from the run in with the nachzehrer, but Dean was in his element, fixing up Baby. Sam still felt a little silly calling the car that - even in his head, but he couldn't help but admit how much the car meant to both of them, so he let himself use the name Dean had bestowed upon the car.
The music was pounding out of the little, but powerful bluetooth speaker that Sam had given Dean as a gift. Both brother's loved their music, but when the older Winchester was working on the car, earphones sometimes got in the way. Sam walked over to the speaker and turned down the volume.
"Dude!" Dean griped at him "What?"
"I can hear this in the library Dean!" Sam said without any heat. Dean just shrugged and started digging through his toolbox for something. "Besides, don't you get tired of the same songs over and over again."
"These are classics Sammy, what's to get tired of?" his brother grinned. Sam had to smile slightly back at Dean. His enthusiasm was hard to squelch plus, big brother had a smear of grease on his face that gave him a lopsided mustache. "Sorry you're taste in music is so crummy little bro. I don't know how you stomach that emo crap you listen to. Dean teased, walking closer, not disappointed when Sam's expression slid into one of his patented bitchfaces.
"Hey, you shouldn't criticize when your five favorite songs date from before you were born." Sam huffed. "I bet I can list the top most played song on your ipod, you couldn't even name a single song on mine." Dean looked Sam in the eyes. Sam's tone was light but Dean saw the flash of irritation, and maybe even a dash of hurt in his brother's eyes. Sam was right about one thing. Dean had no idea about the music Sam liked, he didn't even know his brother's favourite song. Even when Sam drove and by the Winchester rule, was able to pick the music, he generally stayed in the classic rock genre or 80's station, at least if Dean was awake. Sam was often doing considerate things like that, and like buying him the kick ass speaker that was still playing quietly in the background. Maybe he should make more of an effort.
"Tell you what Sam, I'll get cleaned up and make some lunch and you can play me your top five songs." Sam looked dubiously at him. "I mean it, I'll listen to all five and I won't make any gagging noises. Promise."
"Really Dean, you're going to listen to my music and not roll your eyes or complain?"
"Well, no matter how bad it is, it can't actually kill me." Dean said as he tossed the rag into the bin and brushed past Sam into the bunker. "Meet me in the library half an hour."