Jedadia,
In case no one mentions Cabarete, I'd strongly suggest Cabarete.
Honestly, for anyone in their late teens to early 30's I don't think it can be beat.
In center of town, across the street from the beach...
Cabarete hotel Dominican Republic–Puerto Plata - Cabarete windsurfing and kitesurfing
Hotel Cabarete Dominican Republic : Cita del Sol, Cabarete Dominican Republic, République Dominicaine, Dominikanische Republik, Republica Dominicana
In center of town, on the beach
VILLA TAINA HOTEL
Azzurro Clubs - The Best Caribbean Vacation Resorts in the Dominican Republic
You can Google 'Cabarete hotels' and find many options.
If you see something you like, post the name & you should be able to get some good feedback.
Note: there are all-inclusive options (room, food, drink) if you want to have a pretty good idea in advance as to your budget. however, you can easily go with a small hotel here in Cabarete since there are many cool & reasonably priced restaurants in the center of town. Think US$5 for breakfast & US$8-10 for lunch & US$10-15 for dinner. (not including alcohol)