Whichever energy drink is the cheapest at Woolies / Coles when I'm out of them!
I have never had a coffee in my life, so I can only comment on the energy drinks themselves. I usually only have one per week, but will on the odd occasion have a 2nd on another day.
I work in aged care as an allied health worker (activities, games, bus trips, ect ... the fun stuff!). In general, if I'm sitting still for more than 45mins or so, I'm asleep. TV watching is a short affair in the evenings!!
Anyway, after lunch on a Wednesday afternoon, it's Bingo time ... and I'm the caller. It goes for nearly an hour-and-a-half. Of me sitting still. Calling numbers (which in itself can be like counting sheep at times!). Once I nearly drifted off to sleep mid-game. That was about 8 or 9 years ago, and ever since then, I've had a V (as they're usually the cheaper of the regular-sized cans ... I don't go for those massive cans) at lunch time.
I, too, have also found I have no trouble sleeping after drinking one at night (I tested myself), as I find the drinks only get me back to a normal level of energy. I don't get hyper, but I suppose I probably would if I had a few per day, or drank one when I was wide awake and full of energy (why would I drink one in that instance anyway?!). They last about 3hrs for me, which is perfect timing for my day's regular activities!
So, to answer the original question more directly, the ones I have / prefer the most are:
V (any colour, but green or blue are the more common)
Mother
Red Bull
There used to be another one years ago, I think it might have been a Woolworths el cheapo type brand, that was alright too ... but I haven't seen it in a long time!