I've only heard three Coldplay songs: Yellow, In My Place and The Scientist. My favorite is "The Scientist". It sounds so sad.
"The scientist", "Talk" and "Warning sign" By the way, I've read today that Chris Martin found his inspiration for X&Y by watching porn movies
Trouble, In My Place, Til Kingdom comes. But there's so many more. Coldplay has my heart and I get to see them in 16 days. I'm ecstatic.
Miss you, Yellow, In my place, Beautiful World(can't think of the actual title), Trouble, Green Eyes...list goes on and on. EDIT: Oh, and Politik (think that's how they spell it...)