Line Cutting
It may not matter where you cut on the line when you are making planes, ships, buildings, (I do not make them, so I do not know that for sure.) but it makes a big difference if you are making models of people or anime characters, especially if their faces are white or pink colored. When you cut in the center of the line, there is still a very narrow black link that will show up on light or white colored surfaces of the model. Thin, black lines do not look good on a face, arms, or legs. Perhaps the most important thing is that you are consistent in your cutting style. Cut on the line all the time, inside the line all the time, or outside the line all the time. I am still a newbie, so please correct me if I am mistaken. Thanks.