I went to a nude beach. Would I do it again? Maybe.

Went celebrity hunting in the middle of a large city by myself in the middle of the night, ran out of gas on my way home and my paycheck didn't get deposited for 4 more hours and I was almost kidnapped and murdered by a semi truck driver.

Got married for a third time. That is something I will never do again.

During my senior year of high school, I wrote to every university I could find in England. In a handwritten note, I asked them for a scholarship. (My dad said it was the stupidest idea he could imagine.) One said yes. I spent my Freshman year of college one hour south of London.
I would definitely do it again.

I got a supervisor to quit by calling the new boss anonymously and reporting her lack of integrity, lieing, and her aptitude for shirking her work. The next employee review she had was a "bloody slaughter". She had no choice in her mind but to quit. I was hoping they would fire her. Instead they made her review so overwhelming that she felt inclined to quit instead. She deserved what she got. Once, while a newly-hired obese co-worker was walking across the parking lot to the entrance of our facility, the boss noticed her and said to her face "Are you sure you'll be able to do the job what with your weight issu?". The co-worker who was terrified she was being threatened about her new job and who was a single parent, said that she could. No problem. When she got to our mutual work area, she bursted out in tears. So, you see, that bitch got what she deserved. And yeah, I'd do it again.

Jumped off a moving ship into turbulent ocean waters, trusting that the boat captain would return an hour later to pick us up...my first scuba drift diving...and yes, I do it all the time.