It is very difficult without a good exam, profile photos and such to determine if one is a good candidate for a tip rhinoplasty. Your rhinoplasty surgeon will assess a number of anatomic features of your nose that may affect the result of a rhinoplasty. This includes the quality of the skin, the thickness of the fat underneath the skin, the cartilage and such. If one has very thick layers of fat between the skin and the underlying cartilage, it is more difficult to make a significant change compared to somebody who has thinner skin and thinner layer of fat. However, it is possible to improve tip definition to give a more refined tip to the nose. It is not unnatural to be able to see the nostrils, just take a peek at various models in magazines and on the Internet however, if one has an ill-defined tip, it tends to highlight the nostrils. If on exam the base of the nose appears to wide, often this can be changed also. One quick note on selfies via a cell phone. The small lens distorts the optics somewhat and makes the center of the photograph slightly larger compared to surrounding areas. That is why portrait photographers use very specialized lenses to obtain realistic proportions of the face.