I grew up in a house where coffee wasn't allowed, so I've actually never had it before. I have avoided nearly all caffeine my whole life out of habit (one of those cases where a rule you grow up with sticks with you even if the original justification for it didn't).
Drinking a Coke is enough to make me bounce off the walls. I've often wondered what would happen to me if I tried coffee or an energy drink, but based on how strong the effects of sugar and small caffeine doses are on me, I'm far too scared to experiment. I do think coffee smells amazing, though--walking into a Starbucks is always delightful, even if I only ever buy hot chocolate there.