I followed Leandro suggestion and stayed in Amami Resort, in Talipanan Beach.
In general I would not consider Mindoro, or better the tiny part of the island that I visited, as a Highlight, especially Porto Galera and White Beach which are very touristic places, often expensive and surely crowded with hawkers insisting in selling you some tours. However there are some nice places and spectacular waterfalls like Tamaraw Waterfalls, just on the main road near Porto Galera and the even more spectacular Tukuran Falls near San Teodoro village. Yet the part of the island between Porto Galera and San Teodoro is highly spectacular with scenic view of the ocean encased in a lush, green, rainforest.
I was told that the nicest and wildest part of Mindoro is on the south west coast which is a still undeveloped area, difficult to reach, difficult to travel because of gravel road full of potholes and crevices, very spectacular though.
Once you get to Sablayan, a slamm fishermen village, by boat you can reach the tiny Pandan Island where 30 years ago a frenchman settled a confortable but laidback resort. No wifi, no TV, I mean it's a lovely way to relax in a very secluded island and also to visit the near Apo reef which is also a spectacular and natural place to experience a wonderful excursion between sea and mountains.
I spent a very pleasant week in Amami resort (1500PHP per day) thanks to Fabio and his Pinoy mom, they are a perfect mixture between Pinoy courtesy and Italian exuberance, always helpful and friendly. Moreover, Max, their friend, cook, associate-manager prepared delicious meals (pasta, grilled fish, roasted potatoes, marvellous salads) and had a huge amount of patience to explain me Pinoy culture with its ups and detriments. He has been living in The Philippines for the last 6-8 years and he really knows how deep is the gap between western and Pinoy culture, from small cases to important stuff.