The first style guide was made by animal planet which can be found here.
Thee style guide was relatively easy to follow. They provided RGB and CMYK values for the colors they used and they also listed the only colors allowed to be used without prior consent.
They explained their exclusion zones and A line strap devices and A line logo rotations. What made this style guide particularly good is that they provided examples for each category they listed.
The second style guide is from AMD (which can be found here). I found this stylesheet a bit too detailed. Although they added examples at the end of the stylesheet, there were several pages that I found unnecessary such as the personality identification and brand philosophy.
The style sheet did however provide good descriptions of typefaces and colors
Some of the examples used also seemed unnecessary
The next style guide I looked at was the argento style guide which can be found here
This style guide was mostly concerned with the logo and how to display it. Although there was information about coloring, it was only with respect to the logo and not any other documentation that may be added.
Barnes and noble was the next style guide looked at and was by far the most descriptive (can be found here). The wet into specific details about their typography and how their unique ampersand sign should look.
They also spoke about their sub brands and the typography of those logos
For colors, they also provided PMS, CMK, RGB and HEX values
Although extremely detailed and informative, I think this stylesheet was too descriptive
Finally, the last style guide I looked at was foursquare (which can be found here). This was my favorite style guide, it was concise and descriptive. Each page spoke about 1 important topic, provided examples then moved on to the next.