There are many good places to stay in Bangkok on distinct prices. Some are better than others though. Where you stay will make a huge impact on your entire trip to Bangkok so figuring out the best place to stay is always advised. For the complete feel of the city, the hotels on Sukhumvit offer the best of the best.
You will be right in the center of everything like all of the best shops, the best eating and the best night life too. The area is safe and is inexpensive too. This is a popular street that many of the touritst prefer and find that they miss out on nothing because of the convenience and ease of access.
There are other great places to stay too. That depends on what you are going to do in Bangkok. Siam is also in the center of everything and is a favorite place for tourists to stay. You will find a large array of hotels there and things to do as well. When looking for the best place to stay, keep safety, affordablity and the convenience in your mind.