I think the biggest difference is diet. People in Hunan like to eat spicy and salty things. If the fried pot is not cleaned, the next dish will be spicy without Chili, which is very different from Suzhou. Cooking by yourself can solve this problem.
Nowadays, people are running around. After living in Jiangsu, Northeast China, Sichuan and Zhejiang for more than a year, and staying in Hunan for a month, I still fully adapted. I wish you happiness and health!