I used to drink massive amounts of beer (or anything else) and had little effect on me.. but these days I rarely drink and when I do, I get warm and fuzzy from a 6 pack..
Caffeine on the other hand, I must have massive amounts of caffeine to function and I don't have any trouble falling asleep after drinking coffee all day up till bed time.. my lack of sleep comes from not having time to! lol if I suddenly switched to decaf I'd probably slip into a coma!
_________________
"He was a dreamer, a thinker, a speculative philosopher... or, as his wife would have it, an idiot." -Douglas Adams