I think Red Bull is positively nasty. But whatev.

No energy drinks seem to have any obvious effect on me (other than keeping me from falling asleep - I still get exhausted, I just can't actually fall asleep, despite how much I want to), so I take them for the flavor value. And having said that, Bawls is the best tasting energy drink on the market. I've tried a lot, and none of them have tasted as remotely good.