Unhappy with a review? Unhappy you didn't reach number one on the NYT bestseller list? Leave it be, leave it be, leave it be. (And ask your husband to leave it be, and your assistant.)
Or you'll end up with anonymous callers leaving voice messages like this for poor reviewers: "Saying I should just kill myself for being such a miserable person for attacking poor Emily."
I don't think it's a bad idea to respond to good reviews. But try to be Zen about bad ones.