As a genuine response to the OP, the first time I walked the TMB, I took an SLR camera with big zoom lens, a CD player, a dozen CDs, a big book and a stovetop espresso. I like my comforts and, walking solo, wanted to be comfortable if I had to wait out a storm in my wee tent. My pack wasn't particularly light. The second time, and on other multi-days, I have usually been with my wife and a couple of friends, and company means I'm less inclined to read or listen to music.
Of course, these days, the book and CD player could be replaced with a phone, which could also be a GPS and camera and it is even possible to get passable instant coffee. So the two things I would take now would be a phone and charger.
