Favourite song

Music is the best best friend of a person. When you feel high you listen music, when you feel low, music helps you.
I didn't have any idea of what real music is until I came to know about U2 band. They make me crazy everytime i listen to any of their songs.
'With or without you' is one of their best songs which I believe, is the perfect blend of good music and lyrics.
'Sunday bloody sunday' is another song of U2 which is written in the memory of those who died in silent turned violent protests, back in early 70s in Ireland.
Which is your favourite band/artist and why?
any suggestion you want me to try?