WhyGuides.com in general looks nice and simple with a stylish logo and well aligned blocks of content. The strip beneath the header only contains a home link, though it may be a good idea to also link the logo to the homepage. Sidebar begins with a prominent site search box but feels somewhat interrupted by the ad. If ad was put in the same styled box as the search and "latest why guides" blocks it might fit in better.

Content area looks good with each teaser containing a same sized image with a nice gray border around it. However beneath the teaser list there are two blocks which could fit perfectly and possibly look better on the sidebar instead. The "about us" block could be put just below site search and the video box just below "latest why guides".

The article pages tend to have some issues with ads with two or more large square ads displaying per each page with very little margin and often disrupting the otherwise clean flow of content (overlapping content paragraphs or headings or pushing the "share and enjoy" buttons around). I usually suggest reducing the number of ads in such cases as I think a single well positioned ad which doesn't harm the flow of content is probably better than three of them which do and in the process probably annoy some visitors.

Design Rating: 8/10

Focus:

After reviewing MightyGuide.net and WhenGuides.com it's clear WhyGuides.com is a part of a series. It might even be a good idea to indicate this explicitly across all such sites, perhaps in the footer somewhere. In any case, just like the previously two mentioned sites, the name of the site and the titles of articles match up consistently and clearly making the focus well presented.

There is also an about block with a brief description of the site as a collection of best guides and tutorials on various niches. It might be slightly better to use "topics" instead of niches for a more general audience since "niche" seems more of a marketing term. Also, mentioning the guides are free is redundant since they are clearly accessible without charge and few would even expect otherwise nowadays.

Focus Rating: 10/10

Content:

Over 200 articles answering "why" questions there has got to be something intriguing for almost everyone and there certainly was for me. This type of articles somewhat reminds me of "did you know" types of questions and answers. Some seem just like intriguing trivia and others are actually quite useful or important. Some might not be completely factual however and reflect a cultural belief or opinion, but if taken as such are still potentially valuable.

Articles are presented in multiple sections with headings and aren't too long which makes them easy to read.

Content: 10/10