Oddly, my recent experience has been that loafers will get you chosen for shoe checks, while they are less likely to ask you to take off lace-up shoes. However, any shoe with a very thick sole will be likely to draw their attention.
I solved the brassiere problem, too. I wore a tank top under an unbuttoned shirt, and dropped the outer shirt when they started wondering about beeps. That stopped the question fast enough! Also, on the pants thing; remember that the rivets on jeans will
also set off the wand, and if you wear a jacket w/ a metal zipper, send it through the x-ray.