There are all sorts of reasons why this happens and I have to give you an oversimplified analogy to explain complex anatomic interactions.
If you take a baseball and cover it with a silk sheet, you will see everything: a hard round, firm, irregular (stitching) blob that is very unnatural looking. IF however, you take the baseball and cover it with a thick comforter, the baseball will have a soft, mound like appearance that will create a more gentle impression. IF you change that baseball to a volleyball even under the comforter, it will look excessively large and round.
My point is: there is an interaction involving the implant (ball) and the covering (your breast tissues). Some characteristics of the implant we can modify (size, shape, composition of implants, surface) and some aspects of the breast we can alter as well (under/over the muscle, volume of breast, loose skin, position of nipple) while other things we can't. There is one other factor that is difficult to predict and that is settling of the breast. We generally know that implants will initially ride high. However as they settle, the implants will descend. Some more than others. But this is not always predictable in the short and long term.
Clearly the women you describe as looking natural, most likely had smaller implants for their bodies. The amount of breast tissue can also contribute to the snoopy appearance if it "drops" off the implant. To some degree, it is probable that your breast implants will descend but how much is the question. Breast implant displacement exercises may facilitate this change. I would advise avoidance of underwire bras which will maintain the superior position of the implants.
Discuss your concerns with your surgeon.
I hope this helps.