Most of the Senko no Ronde / War Tech OST; especially C.C., Idaflieg and Little Witch.
Battle Garegga Soundtrack - Fly to the Leaden Sky is iconic. Shame Manabu Namiki rarely tries these days.
And for some reason, Heaven's Park from Kororinpa with its Celtic twee-ness also does something to me.
EDIT: @SHMUPGurus: I almost forgot how much all of the Starfox ending music moved me. I remember getting a crappy tape recorder set up just so I could listen to it without having to beat the game each time.
WHERE IS MY KORORINPA 3







