[MrDK]

Looking at the three most obvious destinations: Pattaya, Bangkok and Phuket there are some pluses and minuses. Here is my take (keep in mind that mongering is high on my list).

Pattaya is the best place to monger; without a doubt. On the other hand there is not much else to do there, unless you take excursions. Pattaya is also where the monger gets most for the baht. Even though there is a beach there it is hardly worth it to go see.

Bangkok has a great variety of options. Being the capitol there inherently are a number of related attractions, including the palaces and Wats. Shopping can be an experience in itself in Bangkok; from Chatuchak Weekend Market to the malls. Ton of great dining. Bangkok also feature all the traffic jams and smog you ever wanted.

Phuket is very laid back and there are many fantastic beaches. Patong features the nightlife of Phuket, but lacks the premier beach. It is a great combination of a family paradise and a fairly good place for adult fun. There are many options for excursions as well.

Where you spend you time and how much should depend on two factors. 1. Which are seems to suit you the best. 2. How well you deal with "moving around". Some people seriously dislike packing the suit case and move to another location/hotel; others (like myself) do not care. The time before my last when I went to LOS, I went straight for Pattaya for 5 nights, then to Phuket for 5 nights and finally to Bangkok for 3 nights. I found that to be a good combination. First 5 days to play hard, next 5 days to play in a lower gear and the a finale in Bangkok.

The opinion above is mine and may not be yours, but here you have it.