The absolute highlights are Komodo National Park (komodo dragons, diving and scenery), Kelimutu National Park and traditional villages.
The main attraction of Flores is its pureness. No traffic, endless beauty, nice people. Flores has an unique culture, traditional villages, volcanos to climb, beaches which leave the ones on Bali far behind.
THINGS TO SEE AND DO FROM EAST TO WEST / The Flores alphabet (roads and places from A to Z)
Wae Rebo and Bena are absolutely the most touristy villages, especially in the months May to September. In Bena the situation is not that sad. And outside these months Wae Rebo is still worthwhile. A good alternative for Wae Rebo is Belaraghi which is between Bajawa and Aimere. Bena village is on the UNESCO waitinglist and therefore the most visited traditional village in het Bajawa area. There are still relatively undiscovered gems and the traditional villages are still worthwhile.
Here below a small list of villages:
What are the costs for entrance fee for National Parks?
Published on website https://www.travel2flores.info/planning/practical-flores/
NATIONAL PARKS ENTRANCE FEES
Maumere and beyond (islands north east of Maumere)
It is hard to find a non commercial website about diving but this is one of them. https://www.starfish.ch/dive/Flores.html
Well, yes and no. There are no surfingplace in the meaning of exploited like on Bali, Sumba, Sumbawa or Rote. But there are some stretches on the south coast of Flores near Pruda and south from Hewa (both in the east) where are waves high enough. And maybe some more spots which are not discovered yet.