VolDive,
Pattaya has most certainly no lack of bars and clubs, although the majority are of a certain night life entertainment style. If that's what you're looking for, it probably won't get any better than Pattaya. besides this, Pattaya has a wide choice of day time activities as well.
It seems that you and Pattaya may be suited for each other.
However, having said this, Arizona makes some good points as well, if you have the time and financial resources, have a bit of a look around Thailand's dive areas and settle for the one that you like best.
Regarding Aquanauts, possibly it's best to do a quick search in the Thailand on them, you'll find out quickly how they're perceived here.
Good luck with your choice!