This is just a copy/paste from DS1's birth story. At one stage we'd agreed to a c/s, so our IM wrote down a birth plan and made a few copies:

This included things like mine being the first non-gloved hand to hold the baby, for me never to be alone, that DH would go with the baby and J would stay with me, that there’d be no formula given, only breastmilk. J mentioned that a baby coming at 35 weeks would probably need some sort of extra care, but it didn’t really register. She started hand expressing me to get colostrum for baby’s first feeds. We did this a couple of times throughout the day.
If we ever have a c/s, I'd include the baby staying with me in theatre and recovery, if possible. They can lower the sheet so you see bub being lifted out. Also, I'd like the cord to remain unclamped and uncut until the placenta has been lifted out and the cord stops pulsing. I have read of a lotus birth via c/s so I know it's possible.

I think it's good to have a plan. It only needs to be 1 page and in bullet points. Even if you can't have everything you want, it gives you a basis to start negotation.