When responding to reviews, the biggest thing to keep in mind is to be yourself. You get to know your clients well from helping them buy or sell and hopefully these clients will end up being repeat ones.
This means they know you and your personality, so it is important to put this into your reviews and not automatically respond to multiple reviews.
A client who gives a good review won’t be impressed by a generic ‘thank you’ and the last thing you want is to put a bad taste in their mouth after working so hard to get that good review.
A bad review will only get worse if the response they get is automated and impersonal. It shows them, and anyone else who looks at your reviews, that you don’t really care.