Far more important than the technique is the skill and experience of your plastic surgeon. Choose your surgeon rather than the technique and let them explain why one technique may be better than another. See the below link on some suggestions on finding the most qualified Plastic Surgeon for a...
18 year olds are perky, your breasts are not riding low. your torso is long, the implants are where they need to be. you could go smaller and increase the lift by adding a vertical incision below the areola (lollipop). this would also improve your shape (cone vs. flat). my plan, smaller implants...
Occasionally wounds will open at this time due to resorption of the internal sutures. Only your surgeon will be able to tell if the fluid is coming from the implant (if one was used for the procedure)