I did the same 3 years ago after almost 20 years of slugging it hard. I did plan it for about a year, though, since I have 3 kids between 10-15 years.
Never have any regrets since....spending lots of weekends on kids' sports matches, music performances, etc. Getting involved in charities, trying to improve my golf game, learning to cook for the family at least once a week, and most recently, tripped into a group of fanatics and crazy guys (lucky it was car craze - FLifers) with my maiden FLED 6 to Scotland....
FLED trips 2x a year and golf trips 2x a year, that would do for me...
Get some activities going at your leisure and you will never be bored.
Really hope you enjoy your free time!
Quit work - Get some stuff - Go somewhere - Have some fun