In the UK we tend to get 22 days + public holidays.  I get 25 days and can buy or sell up to 5.  If I don't use my allowance then it can roll forward into next year but I have to use it in the 1st 2 months.
I work flexible hours with the core hours being 10:00 to 16:00 though realistically I tend to work 08:00 to 17:00 most days and sometimes longer.
I also have the option to work from home which is useful for medical appointments, the wretched car etc.
Each employee is given a £300 pot of money to spend on some form of item to help your mental well being.  It doesn't have to be work related though in my case I bought a subscription to Pluralsight, a decent set of headphones (to listen to Pluralsight in the office) and Dr Catherine O'Keefe's book on data ethics.

Free breakfast and lunch is provided and the food is (too) good.
As long as I keep delivering no-one watchest the clock or micromanages.

I know which side of my bread is buttered.