First off, hi and welcome! I'm on the list for a transplant now and I agree that sometimes the "little things" are kind of overwhelming. I definitely had my moments of crying over things like prednisone cheeks and the idea of hair growth from the anti-rejection meds. One thing to remember is that post-transplant you will likely have more health than you've had for a LONG time -- you will probably be able to do more than you thought possible. That said, I haven't known anyone who didn't continue to look more or less like his/herself post-transplant. There are changes sometimes, but most often I think people look better -- healthier, better skin tone, brighter eyes, etc.
Okay, as for the scars: most CFers get a "clamshell incision" -- the scars run under your breasts and sometimes meet in the middle, sometimes not. It looks like the underwire of a bra, honestly. Most women find they can cover the scars in a swimsuit, but honestly I have a friend who wears skimpier bikinis and has had a transplant -- she's a few years out and her scars are really just faint, pale-pink lines. She likes them, and she's about as vain as they come <img src="i/expressions/face-icon-small-wink.gif" border="0">
There are other incision options (down the front, and sometimes a third option where you have two scars -- one on each side -- about midway down the torso running onto the back). Clamshell is by far the most common.