Books from a genre that you don't usually read

What you do when you receive a book as present and the book belongs to a genre that you don't usually read? Do you return the book to the shop and find something that you think that you will enjoy or do you keep the book and see it as a chance to explore something new? Why? I have done both things. Sometimes I return the book and find a book from a genre that I usually enjoy and sometimes I keep it and decide to see it as a chance to broaden my horizon and read something I wouldn't have bought on my own. I have actually discovered some pretty interesting books that way. When I pick my own books I am quite conservative and I tend stick to certain genres that I always enjoy, and sometimes it is nice to be "forced" to try something different. In some cases I discover that I enjoy books that I didn't imagine that I would enjoy.