I have been to Bangkok, Thailand a couple of times and I never get tired of the place. I just love it! There is so many things to do like visit the aligator farm, elephant farm, night safari, wats, river ride, floating market, night markets, the shopping malls and the ever-famous "red-district". Although we didn't go to the red district since it's not my cup of tea and it was a family vacation, nevertheless, there is just so much to see and do...and BUY!
What's good in Bangkok is that, the accommodation is rather affordable and we are talking about 5-stars hotel already. The rooms are spacious with full amenities unlike the hotel rooms in Europe.
Shopping is one favorite activity I love to do so everytime I am in Bangkok, I don't miss out on the malls. They have nice merchandise from clothings to shoes and accessories which are very affordable. Last time I went there, I only bought 300 US$ and I managed to take away a lot of loot already!
Do visit Bangkok and you'll have fun... Check the weather though on when is the best time to go there. Last vacation we had was rainy so didn't get to go out much but still had fun!