Hm, well, I listen to many kinds of music, depending on my mood. But as to bands/artists...

I've always loved Savage Garden. I still miss them.
I also like Linkin Park.
Right now, though, I'm a fan of CNBlue and FT Island.
I don't really have a "favorite" song. The most-played songs on my playlist, though, are "Alone" from the anime Gensomaden Saiyuki and "Momo (Quietly)" by Fahrenheit from the Taiwanese drama ToGetHer.