The only time I drank coffee in the last 4 yrs has been after my wife had an apendectamy and I went from work, to hospital, to work no sleep.

Coffee gives me about 15-20 minutes high, then its a crash mid-work so need more coffee. I never concentrate better and if I'm sleepy I remain sleepy but hyper.

I wake up perfectly fine without it. It is the routine that wakes you up not the coffee.

Also it tastes like shit.