Reason #29: … because of Brač, of course :)
This guy Randy compiled a map with most frequent Google search entries per country, for the question “Why is …. so … ?”. E.g. “Why is Denmark so happy?” or “Why is Ireland so green?”
As you can see on the map, the most frequent query re Croatia is: “Why is Croatia so beautiful?”
I hereby give all these googlers the official answer to their query: “Because of Brač”.
Now, please come and see for yourself :)
This Huff Post article explains more and you can also see the Asian version of the same query, as well as the original, undoctored version of the European map ;).