I completely agree with David's points. My wife and I have also been retired for two years and I really don't know how I found time to go to work. The joy is that it we choose what we do and where we go. David makes a good point about the mental shift from being a saver to being a spender. That we found difficult after a lifetime of saving but after two years, we are there. The other difficulty I found was income tax. For over 40 years, my employer had made all the deductions and usually I had a refund. With many changes in my income sources it has taken time to adjust to making appropriate tax instalments to avoid nasty shocks come April.
That said, retirement is just great!