Oh man. The fast album I heard when it came out was A Rush of Blood, so I definitely have a special place for that. I think in terms of pure sound and fantastic songs as a whole Viva la Vida still takes the cake. I think Brian Eno as a producer really brought out everything the band was going for.
Favorite song is just way too hard for me to pick, but some of my top ones are Amsterdam, Clocks, Strawberry Swing, DAOHF, Fix You and Yellow. How bout you? Favorite album, favorite song(s)?