Verified answer

I'm gonna separate Korean and Japanese ones:

For Korean ones,

Imo best up-beat songs are

Mirotic,

Rising Sun,

O Jung Ban Hap,

Keep Your Head Down etc.

you know, the title songs of their albums and for that reason they have nice MVs.

Also I like

Are you a good girl?

Hey, don't bring me down,

Wrong Number (has MV)

Purple Line (has MV)

Balloons (super cute MV)

The way u are (MV)

JYJ-Empty (MV)

Korean ballads;

Picture of you (MV)

Don't say Goodbye

Holding Back the Tears,

Hug (MV),

JYJ - In heaven(MV)

Japanese ones;

Summer Dream (MV, cute)

Break Out (MV, dark)

Nobody Knows, (sexy, no MV)

Beautiful you (MV),

Survivor (MV),

Somebody to Love (MV, main song of concerts)

We are, (one piece anime ost)

Share the world, (MV, one piece ost)

Darkness eyes, (weird but awesome song :P)

9095, (eccentric, dark composition of JJ)

Miss you, (MV)

ballads:

Stand By U, (MV)

Taxi, (so sad)

Kiss shita mama sayonara, (so sad)

Kiss the baby sky, (MV, fun, emotional)

Wasurenaide, (JJ's composition)

Begin, (MV)

Love in Ice, (perfect song, definitely see live)

Lovin you, (sad MV)

Bolero, (MV, better in live, amazing song)

Toki wo Tomete, (5's last MV)

Asu wa kuru kara, (MV)

JYJ - W (double u, the song for other two)

I just wrote the ones that came into my mind so if you see me in some other place saying something else don't be angry ok? I love every TVXQ song, but these are the ones I like the most but I have a weak memory :P If I didn't write about the MV then there isn't one that is shot by the guys esp. for it... probably...

This is my favorite :

Mirotic

Why Did i fall in love with you

Stand by u

Bolero

wrong number

purple line

Crazy Love

Insa

Proud

Hug

Picture Of You

Tonight

Begin

Break Out

Love In The Ice

Survivor

The Story has Just Begun

Kotoba Ni Dekinai

Kiss Shita Mama Sayonara

Love Bye Love

wasurenaide

Believe

Harudal (..)

-JYJ

Get out

In Heaven

Be My Girl

Found You

The One

Ayy Girl (..)

-DBSK HoMin

Why

Duet

She

Maximum

How Can I (..)

I love all their songs as 5 and 2 and 3

i just gave my favorite ones