I am quite the energy drink connoisseur, and have tried many many types and experienced their effects. I can say a few things with confidence. Redbull is glorified soda pop, and I don't even consider it an energy drink.
Avoid the ones with sugar (even their sugar free verions are bad). If it's not clear, and sugar free. Do not drink it. Its just soda with extra caffeine, with vitamins your body probably can't absorb, and turns your piss neon green, and gives you the jitters. (i.e. Monster, Amp, Rockstar, NOS, Full throttle, Venom.)
The coffee ones will give you stomach or ass cancer, no that isn't a joke. Carrageenan is atrocious for you and they use it in most of them (to prevent settling and separation of milk).
That being said, and you still want to drink them. I highly recommend the dye free, clear, sugar free energy drinks such as Celsius, C4, Bang and Reign. Just remember, it takes like 5+ hours for caffeine to get out of your system. So never drink them at night if you want good sleep.