Hi all...I'm new to this board but not new to Coldplay. I think all three albums are marvelous, and each one evokes a different mood for me.
'Parachutes' was all about despondency, with very little hope shining through.
'A Rush Of Blood To The Head' seems to point more towards constructive work and problem-solving, with hope more visible.
'X&Y' is the fruition of the despondency and problem solving turning to hope and finally arriving.
These are just my insignificant opinions, mind you.
That being said, I'll honestly have to go with AROBTTH as my favorite. It blew me away. Absolutely away...
Peace!