Loved Dubrovnik, the whole place is gorgeous. Picture perfect. I was never so trigger happy. Walk through the old town, walk to the harbour, walk up on the city walls.
Insider Tip:Go early (we reached at 8am) to avoid the tourists that will start pouring in at 9/10am. Ask for student price for the city walls admission, it's 70% cheaper than regular price. I would recommend walking through the old town in the late afternoon/ evening/ night, and up on the walls in the morning.