Most ball pythons will have a similar disposition. Their docile temperaments are one of the major reasons they're the most popular snake in the pet hobby.
Of course, some will never settle down to quite that extent.
Both of my BPs are super chill, both content to chill and watch TV with me for basically as long as I want to keep them out. I typically cut handling sessions off at around an hour, but have gone longer.
I find it's important to read and understand their body language and mannerisms and let them "tell you" when they're ready to go back into their enclosures.
With my BPs and King, I almost never see any behavior that indicates stress at all when they're out. My Hognose, KSB and Borneo STP are all good at "letting me know" when they've had enough though.
So I think your best bet is to watch and observe your BP while out. Look for increased tongue flicking, noticable inflation and deflation of lungs, and quick skittish movements. Those are all signs of stress or discomfort.
BPs should make slow, calculated movements with slow consistent tongue flicks.
Try to always end handling sessions on a positive note as well.