If you as a patient feel that one over another type of incision is right for you, you should choose a Plastic Surgeon that feels comfortable performing that type of incision.
There are also pros and cons to each incision site. The majority of surgeons have a particular incision they prefer, so it's up to you, the patient, to figure out whether you feel comfortable with the Plastic Surgeon’s choice. The most common incisions are:
1) Inframammary crease (the incision is done at the crease of the breast)
2) Areola Incision (the incision goes around the lower part of the areola)
3) Transaxillary (the incision is placed in the armpit)
4)Tuba (called scarless breast augmentation, goes in through the navel)
Both the Inframammary crease and the areola incisions are the most popular procedures. Keep in mind that there is very little documentation to associate any particular incision with more or less risks of loss of nipple or other sensation. In fact, most doctors agree that the loss of sensation has a lot more to do with implant size and surgical technique, both of which can dictate how large the area of insult to nerve endings will be inside the breast. There is no BEST incision, again its up to the surgeon and the patient to discuss the location of the incision.