When you retire what do you do? Take up painting? If you retire young a lot of your friends will still be working.
The OP talks about living off 30% earnings if he retires at 33. Downgrading your life style is fine but surely you would be spending more on activities to keep yourself busy?
Currently I cannot see myself completely retiring. I like the idea of optional employment. Choosing to work part time for the challenge the work brings rather than the money. I look forward to that day.
I currently dread the idea of full retirement.