Interesting you mention Powerade, as I drink a bottle of that now before and after training, and in recent years have bought it for days at work which are more physically strenous than the norm.
Can't say I've ever tried Gatorade, but often Mizone is instead on special.. (Most places tend to alternate their Mizone/Powerade specials)... I'm less of a fan of Mizone.. probably because it has less sweeteners..
As for those so called energy drinks, cough... caffeine bursts.. I think it is dangerous the way the youth have taken to them... I've heard my 'stepsons' friends even bragging because they have drunken 3 times the daily limit and feel great.. the scary thing is you can now buy instant shots of it over the counter at dairies
That said, I do like the occasional bottle of Lift myself... but it does disturb me just how much of it, and how much soft drink kids of today drink...