Echo:
I'll offer my opinion on this as a TERB member who may not fit the general TERB demographic (Never been to an SP, never been to an MP and, now, only very rarely ever go to an SC) Believe it or not I come here cause I like the dialogue in the lounge.
Funny thing, I have a very dear friend who is going in this week to get hers done. As much as I'm being a supportive friend to her, I have discouraged her from doing it. This has been to no avail. She says the same thing as you that "she's doing it for her and not for anyone else". I, in no way, am intending to sound condescending, but what I can say is that I hear this a lot from women that want to get an augmentation. While this may be true (I don't pretend to understand what provides any individual a sense of self actualization) I have formed a few opinions on this stuff through my discussions with my friend over the last while.
A quick survey amongst my guy friends has led me to believe that, generally speaking, men like the "novalty" of big boobs in a cartoon sort of way. They find them pretty cool on dancers or someone walking down the street but, they seem to regard them as more attention grabbers than something that they really care about when it comes to a relationship. I have 1 or 2 friends who are "boob" and MUST have a girl with big boobs. No other physical attribute matters, the girl can be slim, fat, tall or short. It doesn't matter(These friends are usually the ones who end up being absolutely unable to maintain a relationship). From a purely physical standpoint it's a very rare case where I find boobs a deal breaker as far as a guy being attracted to a girl. (a fat butt, or unattractive face can often be a deal breaker but not usually boobs).
Even still, in a relationship, ultimately, none of the above things matter over the long haul. It may sound like a cliche but it is truly the type of person that matters and how you gel as a couple. It's the whole package that matters (physical attributes, personality, items in common)
Now, most, women I've spoken to on this issue feel that getting an augmentation will make them more attractive, will give them more self confidence and/or boost their self esteem. Usually, what I've found is that none of the above are true (at least not in a long lasting way) and they have ended up disappointed. (not in the boobs or the work of the surgeon but in the impact on their lives). Typically, there has been little or no difference. If someone feels that they have become a stonger person or that their self esteem has been improved, it has often been more of a realization of a level of self-esteem and strength that they just didn't realise was already there.
Echo, I don't know what you look like. I don't know if you have big boobs, small boobs, nice boobs or otherwise. Whichever way you slice it (no pun intended) an augmentation won't, nor should it, change the person that you are. If you are truly doing it for you, ask yourself what you really feel it will gain you as a person. If you can com up with some really good answers then go for it. If you can't come up with some real good answers about what "doing it for you" really means then maybe an augmentation won't necessarily get you what you're looking for.