Unless bumper to bumper I generally try to stay on the left side of the curb lane, the general assumption being i'm not on a bike lane street. If I am I'll ride the lane/road line. I will carve safely into traffic at any point I deem it necessary, not causing honks or brakes mind you. Still, splitting the lanes ot riding the yellow line is the sweet spot for me. I think both cyclists AND motorists need some education as to how to handle the BL-becomes an intersection interaction. Too many ppl riding to the right/front of a car that just might be turning, tossing themselves directly into a right hook, but acting with all the privileged airs of someone who really does think they are legally allowed to do it.