For me one of the biggest things about a song is the lyrics, they have to strike me in some way. this is why pop songs an artists like Kesha will never be worth a damn for me, the lyrics need to be GOOD, and well vocalized, the lyrics on paper could be amazing, but of they're screamed and unintelligible then that's also a turn off.
my best lone song would be Regulator By clutch. chorus is amazing,
"Dream with the feathers of angels stuffed beneath your head,
the regulator's swinging pendulum" X2
now i also love the band Seether for this, and they are my favorite band becuse of this, so my best song from the would be Here and Now, and the part that always gets me is right after the first chorus
"I'm wilted and faded after all,
to strung out and burnt out to be half the man that I could be,
I'll never belong on side your world,
so black out the sun and leave me to play out this same old tragedy"