I... I am ashamed to admit that this is taking me longer than I anticipated to figure out.
I should know these things, but for some reason it's been really hard to discern everyone's taste in music...
Anyway, after pouring more thought than should ever be required into this, I've come up with the following rough ideas that I need to refine later after I put even more thought into this:
Finley - Finley has a lot of stress in their everyday life, so they like relaxing music. Stuff that they can just kinda play in the background to chill whilst working. So I see them more as a classical kinda person than anything else. (I can bet that some MCs would tease them about listening to 'old people music' but Finley probably has a plethora of sarcastic responses at the ready for such comments.)
Raf - Okay, so fun fact, I actually have this one song in my older notes (for the first version of MCU) as 'This is Raf'. And I also kinda think he'd be into this kinda music. (Such is to say: Way too cheesy and sweet). But, yeah, this kinda song.
Lucy - Lucy listens to the kinda music that gets you energetic, work-out song-type. Rock, alternative, anything that gets her excited and pumped up. She loves a good drum and guitar. Those are her favorite things- though honestly she could just listen to drums and be happy. Rhythm is her jam.
Ricky - Ricky doesn't listen to a lot of music that he likes. Actually, most of the music he listens to he dislikes. This is mainly because its usually in concerts or some kinda expensive event that he bought a ticket for a "friend" so he can grin and bear it and get in their good graces so that they'll repay the favor later. As a result, he's not particularly sure what music he likes. He knows what he dislikes at least. (Classical, opera... etc. He just finds them utterly uninteresting.)
Eileen - So, Eileen... Eileen likes vocals, she loves good singers and so she likes songs and genres that show off the vocals. (Lots of jazz songs do that, the song I mentioned before, House on Fire, is apparently called 'vocal noir', and that'd be her kinda thing.)
Jacob - Jacob isn't much younger than the MC, but he is the youngest out of all the ROs, and he's back in school right now to get his law degree. So he spends a lot of time around the young'uns. As a result his taste has kinda evolved to that which he's around, so he tends to lean more towards pop music and whatever is "hot right now".
Informant - This boy spends too much time in coffee shops. He's started to lean towards 'coffee shop' music as a result. Acoustic, guitars, stuff like that. Stuff like this.
Likewise - ...
Okay, okay, I should be serious. Although, they probably do listen to a lot of off-kilter or otherwise "odd" songs, if for no other reason than for the reactions they get out of people. But they're kinda like Lucy in that Likewise likes a li'l energy in their song. Where the two differ is whilst Lucy is really into the drums and the beat, Likewise likes something they can hum along to. Energy and melody.
Yolanda - Yolanda is mature, so her song choice is mature. Not quite like Finley in that she likes classical, but more just old-fashioned songs. Torch songs, vaudeville-style, cabaret-style, that sorta eras songs.
I mean, probably pretty well. Especially with luck.
You need a lot of luck in Nickelport.