it's not so bad if you have job changes to better fit your lifestyle. I'm still planning to retire before 60, but will find a job doing something else.
My dad retired in his 60s from the restaurant business, then found a job assembling furniture in Jersey City. His last job was making dumplings for a restaurant in his early 70s. Well kind of, in his late 70s became a professional gambler till he got kicked out for breaking casino rules. He's really retired now in his mid 80s and hates it, would do anything if someone gave him a job.