One great joy of stories is their share-ability. I've happily recommended books to friends and often taken up their recommendations to me.
When I run writing workshops, especially for flash fiction, I often share a couple of my tales and break down how I wrote them. I've learned a lot when other writers do this. We're all keen to learn more about improving on what we do.
I base my recommendations to others on what I know of their book tastes but also if the characterisation is especially good. We all read to find out what happens to the characters after all.