I gave mine about 2 1/2 years with little good looking growth at all. Actually, the looks of that growth gave me another kind of body dysmorphia and I definitely wanted to improve those looks. As to sizing I told the surgeon what I thought I wanted and she basically selected a slightly different and larger size which looked fine to me pre-op. I had used forms since 2007, and tried different sizes along the way, and in the end had a very good idea of about how big I wanted to go.
Pammie I am not sure how tall you are, but you do look very pleasingly thin. I am short, 5-5, and have a rectangular upper body with, for my size, a broad chest. So, small boobs do not and would look good on me even even if they were a little bit larger than my natural growth. One also has to take into consideration body size frame shape and overall look of the final product. Also, one's personal likes/choices may be different from that of others with no one being right or wrong in what they like. If they make one happy, then why not go for it? With the number of very inexpensive breast forms available out there, one can experiment and get close to the proper size that they think fits their body and eye.
As for post op satisfaction, I like the size of mine, but according to my surgeon, she stated that she should have used a bigger and wider implant than she did because I have an obvious 5 finger gap between each boob, which is unacceptable to me. I like my size, but definitely do not like the spacing, which was the result of a too small implant. All these are considerations that I never thought about pre-op.
And a definite NO regarding my choice of size being based on some type of masculine view of what I needed. That may be true for some, but my guess is that common sense in sizing and listening to surgeon's recommendations prevails. I wanted something that fit my body shape and size and complimented my looks. I like my current size, specifically did not want something too large, but do to nature actually need to go bigger if I ever determine how to pay for a revision (remove and replace).
Allie