Mamba, Phuket, Chiang Mai and Koh Samui, which is more fun?

Look at your budget. Rich Koh Samui, poor people travel to Pattaya, Bangkok. Phuket is a very mature place for business development. If your English is not good, you can go to Phuket. Koh Samui is a high-end island, authentic, with little commercial development, except for literature search. The consumption in Phuket is relatively high. Chiang Mai belongs to the rural areas of China and is the representative of rural culture in Thailand, so you can experience it. Personally, Chiang Mai and Phuket are better. After all, you mainly play. Koh Samui is suitable for a holiday.

One more thing: Bangkok depends on whether you transfer. If Bangkok is a transit, you can transfer for one day. Pattaya depends on your interest. You can go if you like folk customs. Compared with Phuket, these are not in the same class.