Okay for me:
Organic food - not everything but deffo organic milk and tomatoes and veg where possible.
Obviously, home cooked food / on site cooked, proper food.
A proper garden where the children can do things, not just a patch of grass outdoors.
The opportunity for children to spend some time with older children at the nursery (even if limited to start / end of day).
Key worker etc
Staff that have an understanding of Vygotsky's theory of devlopment and reflect that in the activities that they do with the child. To be up to date with knowledge on child's progres and to feed back regularly to parents (something more long term than a daily diary)
Staff that are child led - so no controlled crying but if the child needs hugs, they get hugs etc. Staff that show genuine concern and care for the child!
For babies to have their own cots
For quiet areas in the nursery, so babies and children can relax
Knowledgeable staff about children's needs (particularly new knowledge gained from science) and then to act on it - such as how some babies can suffer raised cortisol levels (stress) from nurseries in the afternoons - and so for staff to plan quieter activities for the afternoons to reduce stress levels / make provisions etc
Thankfully, I have most of these at my daughter's nursery (which I think is fab!)