Things in poor neighborhoods are done differently than in middle- and upper- class neighborhoods. People that grow up in poor neighborhoods develop behaviors, customs, and beliefs that are different from other neighborhoods because they are part of surviving in the struggle. When they move on up, some of those behaviors, customs, and beliefs are no longer necessary and can even be harmful (e.g. strong reactions to perceived attacks). Others may actually provide an advantage (e.g. living through power outages). Regardless, these changes can cause a sense of estrangement from their childhood and original culture, leading to some resistance. Given all that:
What did you change and what did you keep?
Americans tend to equate “county” with “poor” because they don’t have first-hand experience with country people. They might also be confused because ostentatious displays of wealth are considered tacky here in the South.
I’m from the rural South and there are plenty of ostentatious displays of wealth. Particularly surrounding how your home looks - decorating for every single holiday for no reason comes to mind.
Plenty of rural Americans are super poor. It generally takes more money to live in the city so that should make some sense. I grew up rural poor - my family were partially subsistence farmers, cutting our grocery bill.
To answer the question from OP - I’m not sure I count as properly middle class but I’m definitely more stable than I was growing up, so I’ll say my biggest changes are being more conscious of what I look and smell like. When you’re poor, everything smells like whatever’s on sale. I have kept my tendency to overbuy during sales for anything is shelf stable for long periods of time even if I already have plenty.