i know both oceans and let me tell u that both are very different form each other even when is the ocean, for me, i prefer the ocean pacific, the sand is whiter, softer and the water is warmer too!! : )
Atlantic, because if I'm going to get in, I don't want to shiver. I suppose when I was smaller, the Pacific wasn't a problem (I'm a native Californian, but been gone awhile.)