We visited Aninuan Beach for the day and had a great time. At times we were the only people there. the sand is ok the water nice but honestly i don't think i could stay there for more than a night. As romantic as it is being with just your parnter, the place is a bit too quiet with nothing else nearby to help.
There was one place called Tamaraw beach resort which seemed nice. It had no guests visible and the outside bar refused to serve non-guests. So it was totally empty. There was another resort open but still under construction which was also very nice.
We stayed in Sabang which isn't really nice but has more going on and travelled out during the day.