Favourite of all time is hard... but I think that i'd have to go with So Far Away by Stabbing Westward. The song speaks volumes to me. Second favourite is probably Eulogy for an Angel by From Autumn to Ashes and in at a close third is probably The Kennedy Curse by Alexisonfire.
And for the record Hitchin' A Ride and Brain Stew are both better songs than Holiday.
P.S. Best cd ever is still Smash by The Offspring.