Well, now that summer is gone, I change my answer from the other times I was asked that. (Back then, my retirement felt a lot like my non-retirement, since I wasn't teaching most summers.) However, one thing remains true: my attention is dominated by unwelcome things unrelated to any job or retirement state.
Still (considering the annoying inconsistency of the local NFL franchise) it is pleasant not to have to grade papers -- especially labs -- which I often did with football on TV to provide distraction from my ineffectiveness as a teacher.
A passing annoyance is ... dealing with Medicare for the first time. Not helped by my being the first of my circle of friends to reach retirement, so I am walking point through that jungle.
Social Security was a snap, once I was told all the forms I had to fill out (and I was told them one at a time, so I ended up doing them serially rather than in parallel); happily the physical SSA office is a ten minute walk from my house so needing to go there was not a problem at all, and almost uniquely in this town, that office has air conditioning, a real plus in August when the highs were in the 90s.