I think the Jomtien Complex area is a good option if you are planning more than just a short visit. There is a great choice of bars and some good, affordable massage shops as well. You also have Dongtan Beach nearby. Accommodation in the area is good value. My summer rental, in the condo below, comes in at 22 euros per night for a 1 bed apartment, for example.
The atmosphere is a bit more laid back than in the other areas and its very easy to meet people, both boys and fellow travelers, in the bars.
It's also quite handy to get to the other gay areas, Sunee and Boyztown, by Baht Bus or taxi, for a night out.
(photo from the Cocka2 Bar Facebook page)