It’s been my experience at work that productivity is sought at the cost of random acts of laughter.
We should have more laughter and randomness, but not planned.
I love the surprise element of humor. Good humor defies expectation. It leads you down one path and denies you the ending you wanted to tell and shows you something better or more real. I suppose that’s a matter of taste.
Perhaps, my more universal thought is, try to take yourself a bit less seriously — a little (appropriately timed) laughter always helps… sometimes.