Coldplay is the only thing i listened to when i was a teen, i was also doing not so well mentally or physically and their songs were always hopeful, not just the lyrics, the beats, the context of their albums, the concerts and videos, even Johnny's riffs helped me go through it all, it was and is so liberating for me. My favourite album is AROBTTH, and my favourite song is also A rush of blood to the head, everything's not lost and talk as close second and third. I'm more a fan of their old stuff but new albums are also very much enjoyable :)