Unless my edge is scalloped or curved I do the straight grain binding. I cut, sew together strips, press seams open and sew it one with out ironing it in half. Find that it just works so much better for me. But maybe try out a few different ways on smaller quilts, table runners, place mats, etc. until you find the one that works the best for you. There is nothing wrong with bias binding, just a bit more work I think. JMHO