I have released boys and girls, and had some of each that have hung around or not.
Those that hang around are happy to climb on me, take nuts from my hand, perch on me to eat, hide the nuts they have just been given in my hoodie, etc. And this easy physical contact can persist for years if they stick around.
Most, however, have not wanted to be handled, petted, etc. past a certain age. Most of these have been overwintered squirrels, and many seem to move beyond wanting to be petted by about 6 months old, so before their release.
Enjoy them however they are, and do not be surprised if they change as they reach adulthood.
It is such a treat for you to have these guys stick around!
Also, my released squirrels tend to be quite happy to come back inside my house. In their case, it is where they grew up, so they are quite comfortable and like to visit and explore. I am fascinated that some of your guys who did not grow up indoors are doing so. I have found even my friendliest wild squirrels to be hesitant to come inside. A few have ventured onto my enclosed porch to be fed, but then quickly headed back outside.