Personally, while I might not die without chocolate/chocolate flavoured milk, I would probably become psychotic and depressed. But I am abnormally addicted to the stuff, and I'd get used to eventually. And I wouldn't feel incredible pity for others who can't have it, since I'm aware that not everybody shares my addictions.

As for being jealous of CFS, I would like an "excuse" to lie around all day with nobody justifiably telling me I was just being lazy, but I imagine chronic fatigue wouldn't be quite the relaxing lying-around-all-day experience that people who are jealous of you must expect, but more of a you-feel-like-you've-just-worked-a-solid-week-but-have-nothing-to-show-for-it-argghh experience.

(And hey, I could have CFS anyway. Though I think it's actually narcolepsy. Or cats-fall-on-me-a-lot-while-I'm-sleeping fatigue.)