Coffee for me. I've tried a bunch of the energy drinks, haven't found one yet that I could stand the taste of. Every one I've tried left an aftertaste like I was sucking on a penny or something.
I like the Monster Vanilla Bean. And I've had a couple of the Bang's as well. Black cherry vanilla wasn't anything special but it wasn't especially heinous either.
I'm not much of Energy Drink guy. I stick to a large Coffee to start the round off. When on a trip in Michigan, I tried Stok Caffeinated Shots
from 7 Eleven for added boost to my Coffee. Unfortunately, they are not approved by Health Canada, so not available locally.