Liver - I don't know why but brown dogs tend to draw me in. Then it would be solid Black - maybe with a white flash. Dark Blue Roan, and I do like dogs with a bit of ticking in their coats.
I dont mind any colour in a cocker really although i'd never buy a solid black or solid liver and I dont really fancy the black and whites. Actually, there is a man lives near me who has 2 littermates. One is a deep golden colour and the other is a lovely shiny liver. Both are stunning dogs. As my signature says, my first choice would be an orange roan working cocker.