Hot and Busy
Bangkok is a busy Asian city, lots of shopping, lots of Wats and other interesting sites and lots of places to eat. But also lots of people, lots of traffic and air pollution. For a relaxing break I would prefer Chiang Mai which is only an interesting overnight train trip away or one of the Islands for those who want the beach and bar scene. My personal preference Koh Samui.
Insider Tip:Get a massage after you have checked out the reclining Buddha at Wat Po, Get an interesting view of the river from Wat Uran, check out the palace and Jimmy Thompson's house and don't believe anything a Tuc Tuc driver tells you. There are a lot of cons in Bangkok.