For me away from work a little pocket pry bar is one of those things that seems to come in handy all the time for awhile, then not at all for a good while, then it starts to come in handy all the time for awhile again.
Paint cans ? I don't use much paint that doesn't rattle but I do use wood stain frequently, I have a couple paint can openers but misplaced both recently.
I can grab a screwdriver from the draw and misuse it, I can walk across the shop and grab one of the many pry bars off the wall, or I could just reach into my pocket.
At work ? Definitely, I carried a 6" Vaughan wonder bar then their 6" pry / scraper combo ( one of the greatest tools ever ) but some things change in my carry and those are now in my bag or toolbox, I have just been using the 1/4 standard on my leatherman bond, but that's less convenient and again a misuse of the tool.
Countycomm accidentally sent me their little 3" flat bar the other day by mistake so now I own one, and lately I've been having the need so in my pocket organizer it goes.