This is a beautiful, small island with gorgeous beaches. Papakino, Firiplaka and Tsigrado are certainly the places to be but there are also many other lovely beaches around Milos. Take the boat tour and you will see some amazing places, like Kleftiko and Gerontas. Just put more signs to the beaches because it is very easy to get lost. Also some more umbrellas wouldn't mind.
Adamas is a lovely port with a fun nightlife, but it has only four bars. Do not miss the sunset from a bar in Plaka. Have fresh fish in Apollonia and do not miss the small villages in the inland.
I like that things are so traditional in
Milos. In contrast to other Greek islands, we didn't see so many luxurious hotels with pool and jacuzzi. (I wonder, if you have a water lack on the islands, why make pools? and also if the beach is 5 minutes walk, why again you need pools?) Hotels are small and family run in Milos. Car rentals should be cheaper and ferry connection from neighbouring islands should be better.