I have one. I wasn't going to because I'm delivering at a baby-friendly hospital that's pretty low-intervention (20% c-section rate!), with a team of midwives whom I completely trust... I also work at that hospital (though not in L&D), so I'm familiar with policies and what to say/do if there's an issue. Stuff like no IV, being able to walk around, being able to eat/drink, intermittent monitoring, etc. - is pretty normal. But I wrote one because I had a few other, specific requests that I want the staff to be aware of.
For starters, I really want a room with a labor tub, but there are only 2, so I put in there that I'd like one if it's available. I want to be able to use a ball, too - they have them, but who knows if I'll think to ask about it. I don't want anyone to give me estimates about how long it'll take or how much time is left - when I had my first, they kept telling me it was going to be hours and hours, and I didn't think I could handle the pain getting so much worse. Turns out I was progressing quickly; I went from 5cm to delivered in about 4 hours. So this time I don't want to think about time at all; I just want to take it one moment at a time.
I also added a note about my husband, who has type 1 diabetes. There's a good chance he'll forget to eat in all the excitement, and I doubt I'll notice an oncoming hypoglycemic episode while in the throes of labor.
So I asked the nurses to just be aware and offer him juice/soda, or some of the snacks we've packed, if they notice him acting funny. I'm going to throw some glucose tabs in the snack bag, too.
If I didn't have anything specific or semi-unusual, I probably wouldn't have bothered. But I did, and I don't want to be thinking about it in the moment.
Oh, and I started it by saying that we are fully confident in our choice of caregivers and delivery location, and look forward to working with the midwife team and nursing staff, which is completely true. Honey vs. vinegar, y'know? Being on the other side of the patient care experience, I know that when a patient or family member starts out with hostility and/or obvious mistrust, it's going to be a bad day for everyone. I want to go into this positively, and make things as easy for the staff (and us!) as possible.