These are the many songs I love to listen to when I'm down. WARNING: I'm pretty Coldplay biased :P

Everything's Not Lost- Coldplay

See You Soon- Coldplay

We Never Change- Coldplay

Fix You- Coldplay

Trouble- Coldplay Sparks- Coldplay

Careful Where You Stand- Coldplay

The Scientist- Coldplay

Paradise- Cokdplay

Wash Away- Joe Purdy

Miracle Drug- U2

Fu*king Perfect- P!nk

Beethoven's Suite No. 1 in G Major on cello (BEAUTIFUL MUSIC)

Moonlight Sonata (I think)- Beethoven

Clenching a Tight Fist- Beast

Rainy Days- Beast

I Cherish That Person- Yoseob

Thanks To- Junhyung/Yoseob

Angel/Into Your World- EXO (Both versions)

2am (Breathe)- Anna Nalick

Never Give Up- BangNZelo

Airport Tears- Lay (Composed by Yixing himself before EXO)

Twilight- Kotaro Oshio 

Isn't She Lovely- Stevie Wonder (original, and Ukulele version played by Sungha Jung)

I'm sorry- Sungha Jung (self-composed)

Don't Cry- Park Bom (Sungha Jung & Megan Lee cover)

Close My Eyes- BlockB

 Almost anything by The Piano Guys

Vivi- Kenshi Yonezu (Hachi)

Can't I Even Dream?- Hatsune Miku

Go Away (I think)- Hatsune Miku

Outwards and Inwards- Hatsune Miku (I cry every time. For any Hatsune Miku songs, I can't remember the creators of the songs^^ She merely sings them.)

Inko- Takada Kozue

Butterfly- GD

Dancing In The Rain- B.A.P

Nothin' On You- B.O.B. Feat. Bruno Mars

Count On Me- Bruno Mars

Ordinary People- John Legend

Sign- FLOW (both original and sentimental ver.)

DTechnolife- UVERworld

Pride (I think)- UVERworld

Tank You!! (Arigatou!!)- Home Made Kazoku

Shounen Heart- Home Made Kazoku

Himitsu Kichi- (idk the artist)

Fly Away- (idk the artist. OTL. it's a Japanese song.)

U Can Do It!- Domino

Yura Yura- Hearts Grow

AND I'LL STOP HERE. :) WHAT ARE YOURS?