I believe the rates in which we become thirsty and hungry need to be tweaked. If we want to be realistic. Am I going to die if I do not eat or drink every 4 hours? No, of course not (Well maybe if I was obese). Running without proper hydration should make you become overheated. Causing vomiting, cramps, etc until you eventually pass out, then die. I think the rates in which thirst is needed, it close to where it needs to be, but the hunger in my opinion is way off. I should be able to go a full 8-12 hours by eating 1-2 meals. I am not sure if different food types digest at different rates in game (ex. Spaghetti would keep your hunger satisfied longer than powdered milk.) Currently about 70% of the time I am hungry and thirsty at the same time. I wouldnt put this issue at the top of the list, but it is certainly something that needs work.