I just wanted to say that I'm sorry for the awful experiences you've had before, and that I wish you all the best this time around - I really hope that you can achieve the best birth you can get under the circumstances *hugs*.
My brother and I were both born via c/s under g/a, me because of 'too-small hips' (mum's barely 4' tall and I was born 8lb 1oz, but then this was 24 years ago and I guess the Drs were just doing what they thought was right), and my brother was an emergency c/s as he was premature and born with fluid on the lungs (and was transported by plane from Cairns to Brisbane within hours of birth, mum didn't get to see him until a few days later when they sent her down to Brisbane as well). She doesn't talk much about her births (like getting blood out of a stone when I was pg with my girls and wanted to know about her experiences) so I guess maybe she was traumatised by our deliveries, unfortunately, but in the long run it all turned out okay... I think it's great that you're looking for as much leeway as you can get in order to have a desirable birth experience, I really hope that it all goes well for you Good luck!!