Stop worrying about money
I don't know that I'd ever stop. But for one lump sum, say $2.5 million after taxes.)
Quit a job you didn't like
Retire at whatever age you are
I'll say a cool mil. After taxes, of course.
Over 2 million.
Feel really rich
Over $100 million.
Set up your own philanthropic organization
Critical mass. Somewhwere between $10-100 million.