I'm happy to have found minimal music. It reflects perfectly the way my head sounds on the inside. Main examples:

https://www.youtube.com/watch?v=kAzhzEjkdcI

https://www.youtube.com/watch?v=zLckHHc25ww

https://www.youtube.com/watch?v=PbBkdYCViLs

Touhou:

• "C.Experiment" (Syrufit/OCR; C.Experiment {R13}) [post-rock]
• "Prison Sign 'Restless Confination'" (RD-Sounds; 掲 {R13}) [orchestral]
• "契符「狐憑顕現の祭祀」" (RD-Sounds; 掲 {R13}) [orchestral]
• "夢へと揺られながら" (mameya; 多幸涙雨 {R13}) [classical]
• "目をさませば幻想郷" (mameya; 多幸涙雨 {R13}) [classical]
• "雨垂れ拍子は誰が為に" (Foxtail-Grass Studio; Kazegatari. {R13}) [folk/traditional]
• "眠れぬ浮世の月明り" (Foxtail-Grass Studio; Kazegatari. {R13}) [folk/traditional]
• "signification" (m@rk feat. 灯下はこ、; レタレイト {R13}) [trance]
• "by your side" (Syrufit feat. Cathy; C.Experiment {R13}) [electronic]
• "Lunatic Princess" (Syrufit feat. Cathy; C.Experiment {R13}) [electronic]
• "Lævateinn" (denshūto; Sungrazer {2013}) [metal]
• "Shrimp and avocado salad" (Baguettes Ensemble; Toho Jazz Sessions type SPB2 {R13}) [jazz]

Vocaloid:

• "Reincarnation" (Rin; JevanniP {2009}) [trance]

A cappella:

• "Thomas Gemma Cantuarie" (Hilliard Ensemble; Medieval English Music) [Renaissance]