as far as i am concerned, i prefer soft music and R&B. because when you boring and unhappy,a soft music can make your temper relax, becomes easy, listening to soft music regularly, will gives you a light heart and it is very good for your health. R&B sounds very rhythmed, makes people do things very excited. i remember when i had trouble with sleep, i liked R&B songs, for it has rapid beep, hardly clear lyric, so i can fall asleep very fast.