I have no problem with pie charts. The area chart on the other hand are pure evil. 
For example here, how is the percentage of ios over time? Has market share grown or shrunk from Q3&#x27;11 to Q1&#x27;14? It&#x27;s extremly hard to answer this kind of question except for the lucky ones getting the top or bottom slot.
<a href="http:&#x2F;&#x2F;static1.businessinsider.com&#x2F;image&#x2F;537b72f169bedd1e04384fab-1200-924&#x2F;smartphoneosmarketshare.png" rel="nofollow">http:&#x2F;&#x2F;static1.businessinsider.com&#x2F;image&#x2F;537b72f169bedd1e043...</a>