I had only consumed one or two cups of coffee in my entire life. Tried some instant coffee recently and I can see why people like it. For me, if I drink just the right amount I feel a buzz not unlike when I drink alcohol. Ha, so now I can be buzzed all day...and then get buzzed at night. I've entered a crazy new realm!
Buuuut, I'm so sensitive to caffeine, since I don't use it at all...if I have slightly too much...I'm wired and crazed. Oh man. It's like daytime drinking (of alcohol). NOW I see why all you nuts love coffee...