If there's no regret what case could there be let alone let regret make it worse and why should it make you feel more bitter, do you have time for bitterness if you are dying or in pain or see an angle reaching out for you?
You are there on that bed and who will show up and who will be the one questioning, looking for answers or will no one do such a thing which is possible as well.

For sure your family will be happy with the gifts you leave behind, a good way to remember and cherish the thoughts of you at those moments they find it hard to move on.