Thanks everyone for your replies.
About 15-20%, or maybe more. I'm a minimalist when it comes to spending on material goods..... material goods become obsolete, get lost/stolen or damaged, while the experiences and memories from trips will be there forever.
This post caught my eye for the vacation angle,when my nephew "interviewed" Grandma (my mother) for a class project.
So Grandma tell us about what you did for vacations. She was from the family farm on the prairies so thought quizzically for a moment---we never had vacations in those days.
The percent of gross income rule wouldn't apply here I'm afraid!