Considering living in Thailand or moving to Thailand then this should be a good start on some of the basics of Thailand and how best to immigrate or retire in Thailand. There are a number of locations to retire in Thailand and we cover this very briefly.
If you are married in Thailand to a Thai citizen then you wish to live in Thailand with your Thai wife then you can apply for a marriage visa today. Note that if you are over the age of 50 then you can also apply for a retirement visa even though many prefer to apply for a marriage visa as the requirements are lower.
If you are living in Thailand or visiting Thailand and got married then you need to have the marriage registered in Thailand. This process is a bit more complicated than in your home country. Firstly you need to show that you are not married and this start at your embassy normally in Bangkok.
Wanting to visit Thailand then there are many options. There are several cities in Thailand where you could retire or visit on holiday based on your personal preferences. If you are looking for a vibrant and cosmopolitan city then Bangkok or Pattaya should be your choice.