You know some of these, but …there are certain songs that the second I hear them I think of characters or exact scenarios with said characters, even if the tie is nebulous. Majority of these are original characters, or expies off canon characters. You want the honest response to this question? Get ready for the original fiction characters:

1.  “Sometime around Midnight” The Airbourne Toxic Event. This is Boy Named Earthquake/that haunted cat story down to its bones. This is one character, once troubadour of doomed city, reborn and singing about the love square that once was and still is to the other three, to the outsider prince now mountain god/cat carrying a ghost who desired the princess (who he killed when sacking their city) and how he was pined after by the dancer who is now a witch/war goddess, how he now for centuries has returned but can’t return the dancer’s affection, and the singer himself who loved the dancer, himself desired by the princess. Bolero Effect into Angst and Longing~
2. “Willow Tree March” The Paper Kites. Okay this is Over the Garden Wall, in particular Wirt. Blame an AMV. 
3. I started listening to Florence the Machine’s new album during the full descent into Batfam feels. “What Kind of Man” is Bruce/Selina BatCat Shipping Feels. Which Witch, btw, is that AU where Jason comes to Gotham a bit early to arrange that Stephanie Brown, here her death not yet reconned away, be dunked in a Lazarus Pit, and crawls out of it angry that ‘he killed her. he let her die’ (is this referring to two separate characters? You decide!) and Jason is getting his revenge as Red Hood for both of them. Under the Hood arc goes basically as in canon, except Jason makes sure to kill Black Mask, and a scene in this AU is Jason telling Steph after it’s over how Bruce wouldn’t kill the Joker, but he killed Black Mask for her and yeah this is the anti-villain power couple AU of my heart. In said AU they also end up escaping the League with either Damian or one of his cloned brothers and becomes a fluffy domestic fic i’ll never write. You’d think this all means I can borrow the song emotions for the Under the Red Hood AU that I can feel comfortable writing if I make them fit in the story universe of Rose Red, but no~
4. Florence + Machine– “Cosmic Love” is Beren/Lúthien. “Heavy in Your Arms” is Theon/Jeyne.
5. Woodkid-  “Iron” and “Run Boy Iron” are two very different moments in Rose Red having to do the with secondary ‘sad squire dog’ mentor character. Urwin, deposed priest-in-training, is taken in by Tovias, the bastard son of a noble family with super powers, magic sword, blood connections to important hero and the monster he defeated. Though sent away, Urwin returns to fight alongside Tovias (my faithful dog), Tovias dies. That’s the prequelly bit. Towards the very end of the climatic ending battle, Tovias’s ghost basically kicks Urwin awake/out of death, carries him until Urwin finds his feet and begins to run again to go save the world. 

Oooh, this is hard off the top of my head, but I’ll give it a go:

1. Hero. Use of color in general in that movie but costuming was a big part of that.
2. Marie Antoinette. I didn’t honestly like it, but it had such fun and lovely Rococo fashion (with a twist on accuracy to get the vibe across). Elizabeth: The Golden Age same thing but replace 1500s for 1700s. Even more stylized version of Tudor/Elizabethean, but to convey the mode and impact and this is why I image Noldor elves the way I do.
3. The SW Prequel Trilogy – and no, not just for the wardrobe of Amidala and her handmaids. The Fifth Element, however, for sheer fun and wacky mixed SF fashions, looking a good mix of not-dated zeerust, plausible future trends, but also yeah no not plausible we are in the realm of SF/Fantasy so enjoy it.
4. Man of Steel I love the Kryptonian costumes, this alien but from organic shapes with so much intricate detail and bulky yet delicate almost fragile cage-things. SF whee! and then on earth the plain-clothes, then Lois is introduced in a bulky parka, Clark is shirtless in tattered jeans thank you with a wandering the earth scruff, how cleaned up and bright and iconic the superman costume while clear that this is what comes from that Krypton when it was or could be brighter and way less fossilized. 
5. Okay I’m been cheating. But one more. Rurouni Kenshin. So accurate at times to the original manga but also doing a better job fitting the period and making looks work for live action big screen. Kanryuu’s platform shoes. Kenshin receiving the iconic red gi from Kaoru. Giving Megumi Heian-style noblewoman eyebrows. The police uniforms. Meiji Era’s blend of kimonos and imported Western clothing. The various textures, designs, level of wealth shown by clothes, kaoru’s white and brown kendo look and then her pale kimonos, the badguy costumes… I love it all. Sequel films also good- Aoshi’s iconic white coat so battleworn and stained and the sleeveless look underneath – thank-you. Yumi’s outfits, especially the white lace one. Misao in pale lavender, ho Shishio’s look was enhanced and the gold lining the brocade and how realistically burnt his skin looked.