Is life enjoyable to you? Is anything really worth it? And please include age and occupation?

I'm 20 and working a fulltime crappy manual labour job loading merchandise into truck trailers. My steel-toe shoes don't even seem to fit and I think I killed a couple of nerves. Anyway, life doesn't really seem too great. Nothing really adds up. Perhaps I should get an education but I don't really plan on living that long to use it. Anyway, how's your life going and how old are you?