I can pretty much remember every occasion I've consumed energy drinks. Once on a long drive home from down South, I stopped off at a garage and realised I wasn't as alert as I should be, so I bought two Relentless drinks, one for me and one for my mate to keep talking to me. He fell asleep shortly after, but the Relentless had the desired effect on myself at least. I was driving well into the 4am in the morning and had work at 7am. When I eventually got home and lay on my bed, I just couldn't nod off.
I had a few more of those periodically afterwards before getting bored of them.
I've since gone through a minor phase of drinking the Aldi "Red thunder" energy drinks, I'd bought packs of four on a weekly basis and drank a lot of them, but I was weight training and was tired all the time. I know this wasn't for the best.
There have been a few Red Bull drinks in between, mostly with Jaeger in the form of Jaegerbombs (these are very tasty), but typically I tend to stay away from them overall.
I do drink coffee however.