Yes I live opposite a care home with an additional EMI unit further along. When we first moved in, the EMI unit was a bit chaotic, eg people wandering out and coming to our garden, shouting out for drinks etc (because they had immediately forgotten they had had one). This has been resolved.
I don't find it a problem and I have far more horrid neighbours than those at the care home.
Late night noise is not an issue. Fire engines sometimes attend in the evening, also ambulances etc and pick ups for hospital visits. However, you do get early morning (think 5.30 am) deliveries sometimes, usually once a week this early and it is food. Also you will get waste disposal lorries picking up waste/needles/medicine disposals.
Visitors do park on the road outside and it can get busy. To be fair to the home they do provide a car park.
I am very well set back from the road so the parking does not particularly bother me. If there is an event on in the village and it is hard to get to my house, I then leave my car on the homes' car park.
You may smell cooking odours, which again I don't mind and the laundry smells.
I hope this hasn't put you off. Do bear in mind a popular home will also be likely to extend in due course.
If it was so bad, I wouldn't have lived here 20 years. Hope this has helped.