chiming in to say that fake breasts are an enormous turn off unless a person has deformed breasts or something seriously medically wrong with them.... even a-cups are better than breast implants, aesthetically, in my view. it also says something about someones personality, when they have fake breasts, which i usually find unattractive in itself, as well (although this not be the case for all females who get fake breasts). and for people saying "do it for yourself, not for what other people think", if you examine your motives there, the reasons why you'd be "doing it for yourself" would be based on what other people think of you, or at least your perception (even if it's incorrect) of what other people think of you. so if 'primarily' has to do with your own self-image (which is impossible to isolate from your withstanding perceptions of how you're seen), then examine the details of your self-image and its relation to other people, and how you suspect they see you, and what effect this has on your decision, or consideration...
in general, the people giving their say on that they prefer real breasts should reveal something about these perceptions of how other people view you and how those perceptions may be flawed, if you believe that people see small breasts as unattractive, and that's contributing toward your considerations of 'upgrading'... as is most likely the case in many of the females who get breast implants (for cosmetic reasons as opposed to reconstructive or structurally maintinative). in the case of self-esteem issues, fixing your external self, your body image, any progress it makes will be fairly illusory... the solution to a self esteem or body image problem
ultimately is within, it's entirely internal, it's entirely mentally representational and personal value-based, so in many circumstances, it'll just be masking a deeper issue or deceiving the person into thinking that they 'dealt with the problem' when they only pushed it under the surface or smeared an obfuscating layer of material paint over the psyche malady
