Actually, investing/financial planning is my profession. I don't spend a lot of time on our own stuff. My husband spends zero. Automatic savings, investments in a diversified portfolio of mostly indexed funds. I log into Vanguard once a month to check balances, rebalance yearly and that's about it. No mortgage, no other debt, no budget. (Like MMM, I know what we spend.) We have enough capital for FI. I will continue to work (.75 of full time this year, next year TBD) as long as I am having fun. I also like building a cushion. Makes me feel warm and fuzzy.
I do love reading blogs like this one, but I count that as recreation.