Retirement: When do you plan to retire?

I have been thinking a lot about this lately (I have a birthday approaching) and started thinking about it during my health battles (I am winning!). Those battles were costly to my bottom line and the economy is off-kilter on a number of fronts. I find myself thinking that I might not be able to retire until 75 if at all (sans any lottery winning).

When do you plan to retire?
Never.