Out of my time with Diablo 2, I have always wondered about the defense mechanic. I know that when you get hit while running your defense value is bypassed, and your block gets reduced to 1/3 it's total value. I have always walked in Diablo 2, and am now wondering if it's better to just keep run on by default. For context, I only play HC SSF. I always walk because I remember reading the manual as the kid about how running was meant to traverse, then stuck with it.