Completely depends on the specific watch & why you own it...
To hard to generalize on such a topic...
I prefer the graceful aged Patina "T" on historic Panerai's over the newer pam's cause I collect these watches for the history not the practicality...there is nothing particularly "practical" about a Panerai in general...
If I want a watch that "glows" in the dark than there are far better options out there including some very inexpensive alternatives.
I am often confused by "panerai" lovers that look at the watch as the "only" watch for "every" purpose...
Kind of like saying sneakers are perfect for "everything"...
Cheers
Mark