I mostly watch Phil/Pete/Lou Busardo, and I think that he's fantastic and great to watch.
I'll watch Grimm Green occasionally for a different perspective.
The British dude who blows the great smoke rings is pretty cool, too.
I probably need to expand my horizons a bit and watch some other cats, too, but I don't want to be overwhelmed, either. I will, however, search for reviews of particular flavors of juice on YouTube and watch various people, but for gear and whatnot, I start with Busardo and go from there.