Probably have seen lists like this before, but here's another and feel free to add to or disagree:
Decent income (but doesn't need to be outlandish)
Growing up in a middle class household, perhaps even where money was tight (not absolute but creates a mindset)
If married, spouse thinks similarly (and don't get divorced)
Certainly helps to have a pension
Willing to invest (stock market or real estate) but don't chase the latest sure thing of the moment
Be satisfied with life and not needing material things
Not caring what the neighbors are buying/doing
Enjoy saving/watching the nest egg grow
Stable lifestyle (no fancy cars or crashing cars or keep moving)
Spend what you need, not what you make
Can visualize what life would be like outside the 9 to 5 routine
Decent income (but doesn't need to be outlandish)
Growing up in a middle class household, perhaps even where money was tight (not absolute but creates a mindset)
If married, spouse thinks similarly (and don't get divorced)
Certainly helps to have a pension
Willing to invest (stock market or real estate) but don't chase the latest sure thing of the moment
Be satisfied with life and not needing material things
Not caring what the neighbors are buying/doing
Enjoy saving/watching the nest egg grow
Stable lifestyle (no fancy cars or crashing cars or keep moving)
Spend what you need, not what you make
Can visualize what life would be like outside the 9 to 5 routine