I quite like Hua Hin. It’s not as crowded as Pattaya, and the waves are quite gentle, so it’s great for kids.
The only disadvantage will be the smell. Horse riding are available here, but the horses poo and pee as they please, so the sand is quite stink some times. 
But it doesn’t seem to bother the kids, who refused to spend time at the entertainment centers, but on the beach and in the pool mostly.
That’s why I wanted to try other resorts with private beach next time. It should be a better vacation.