Tifa's breasts were rather...overwhelming...in VII..and all too eye-catching...every time someone saw me playing it and Tifa did her victory move they would say something along the lines of, " Geez, check those titties out!".
At least she looked a little more decent in AC. I think it suited her character more as well; for a skimpily dressed character Tifa was far from flirtatious or slutty.