I took up the jitter fluid habit a few winters ago as the season escalated its war on my well-being. I don't drink it daily, but probably in greater quantities than I should when I do. On one hand, a caffeinated hot beverage helps with the cold and gray weather. On the other hand, it can't be good for my stress to pump stimulants through my system while I am also dealing with other conflicts.
I never took up tobacco or marijuana, so those vices haven't gripped me. I don't like to be drunk, so booze isn't a major threat. Food allergies have forced me to give up cheese, ice cream, and innumerable old favorite foods with dairy in the ingredients. Every meal I eat is a battle to avoid stuff that will make me sick.
I enjoy coffee, but it spikes blood sugar. It promotes the release of adrenaline which triggers the liver to release glucose (stored) for the energy boost the body thinks is required and that glucose enters the blood. Not good for me really, so I thought I'd back it off a bit.
I think many people have dietary constraints, or should have, so it's a fairly common thing but that doesn't make it any easier to deal with I guess. I get what you mean about the meal battle, I understand completely, just from a different perspective.