I think that the Red Bull logo is a particularly good because it symbolizes what the product is meaning to achieve or what the consumer is looking to gain from the product. The Red Bull logo is two red bulls charging against each other in front of a yellow spot. The bulls represent power, speed, and aggressiveness. This makes sense because Red Bull is an energy drink marketed towards extreme sports. The logo is saying that if you drink this product you will get more strength and speed and perform better. I think that the yellow circle represents energy and the blue and silver represent calm and intellect. 

The font used for the logo seems modern and new.  The Logo visually represents everything that to Red Bull is trying to tell consumer that the brand is about and what they will gain from drinking it, and it appeals to a young/ hip demographic.