1) have you regretted leaving work early for any reason ?

Not for one second, but I did start my own company a year after I retired.

2) in retrospect would you wait longer to get a higher benefit?

No

3) has inflation done more damage to your fixed income than you expected?

No

4) do you use your retirement time the way you thought you would? Or do you just waste a lot more time now?

I 1st thought I'd play golf and fish every other day but that got boriung real quick so I started a business and of course got back to music and now play 75 – 85 gigs a year, so I keep busy and love every minute of it.

5) how would you describe the quality of life in retirement? Did you feel more useful when you worked? Or is retirement the high ol' time I imagine it to be?

Wonderful, No and even better!

6) any observations or warnings you'd make to others who are considering whether to retire early?

Everyone's mileage will vary but I say go for as soon as possible.