I'll probably use the same reasons you did Andy, as I'm in a similar situation, overweight and diabetic. I have a few other medical problems with medications that are causing a hormonal imbalance anyway, so I figured I'd just go with it. I've always been fascinated by breasts, always wanted my own, so this is sort of a golden opportunity. My wife's only comment was "I don't care as long as they aren't bigger than mine". Not likely, seeing that she's 48 GG.
As far as work goes, people there know I take a lot of meds so I don't think they'll care, and since I work kind of isolated, they probably won't even notice.
It's kind of sad that other people would even care, but society really casts us in a rather rigid mold, doesnt' it?