Reading this thread most are very blinkered.
I was a childminder but gave up recently.
Childminders follow the same eyfs as nurseries.
I did have a bond with the children i care for but it is very like teachers. I spent time planning thinking about those children when i wasn't working. The children who leave lovely to hear updates but we move on. Some families i am still friends with some i just see on school run, never at all.
I think the family match matters so much with cm's.. completely different approaches to children can be really tricky.
The educational side can be far more tailored to the individual in a childminder as fewer children.
As for favouring own children, one of my reasons for giving up is that i felt my ds was often bottom of the pile.
One thing i fo want to add if i met other c.minders on the park yes we chat - rarely finish a conversation but that may be the only conversation i had with an adult all day.
I am a great believer in trusting your gut, visit nurseries, childminders see what feels right.