Implants can look good and bad. Alot of the time women want their boobs to be perky like when they were 16, so they have rock hard implants put in with the nipple almost facing up. This leaves a huge round ball underneath the nipple line, which looks really odd from any angle.
Implants on a woman with regular amount of bodyfat usually look great, provided there was no problem in surgery. Tip - choosing bigger areolas makes the breast to nipple ratio look more proportionate, if you're getting big implants.