These [http://www.youtube.com/watch?v=IXlFbUOBK2c] three [http://www.youtube.com/watch?v=lBYmesWJtCs] songs [http://www.youtube.com/watch?v=qEt7kmQWhBA] are simply beautiful and quite capable of bringing me to a peaceful, pacifistic state.
As for songs that invoke memories and nostalgia, Pokemon [http://www.youtube.com/watch?v=cbhbLrSQKyY] has [http://www.youtube.com/watch?v=kzwHs9PhJwY] some [http://www.youtube.com/watch?v=kzwHs9PhJwY] (why yes, Pokemon played quite a role in my childhood). Also, in addition to being awesome, Joint [http://www.youtube.com/watch?v=n_Mggtgtiw0] from Shakugan No Shana tapped into some abstract feeling of childhood fantasy when I first heard it. I don't know why, however.