my two cents: don't go into/pick your rotations by places that guarantee a rotation. choose places in CA you think you'd want to go, and do really well on the rotation get a letter (two ideally) and use those letters out west and you'll get many west coast interviews. e.g . if you rotate at a northern CA school (davis, stanford, UCSF, etc) and a southern CA school youd get offers from the surrounding schools if you did well, have a good app, and got a good letter or two. I guess it also depends on strength of application though.