I don't like at all Coldplay but I KNOW that "Clocks" is the saddest song ever, is so goddamm melancollic, so much that sometimes I dig on it.

And another that really gets me everytime but I don't hate the band is "Wish you were here" by Incubus.

And for really getting stuff worked in my mind "Be quiet and drive" of the deftones... it really makes you wanna grab a car and just drive...drive and don't stop...

Oh... a weird one... this one has made me cry a couple of times... Solitary Shell from Dream Theater's Six degrees of inner turbulence... killer acoustic track that always gets me.