Caffeine has absolutely no effect on me except making me need to go to the toilet.
I wish I could get a buzz off it as I love to drink it and that would totally be an extra bonus.
I generally go for a cappuccino without sugar, but I do like the fancy ones as a treat every now and again, e.g. I had a frozen mint coffee which was surprisingly completely gorgeous.
I used to roast my own coffee, and while I could taste the difference between that and store bought, I don't know that it actually tasted better so pretty much gave it us as it is not that easy to get green beans around where I live.
Joe