Simple, does exactly what it says it does, flexible, and doesn't add a bunch of extra crap around the text! Hooray! If you want to style what comes out, well - that's what CSS is for, create a DIV and style it. This plugin gives you exactly what you want - random text.
Oh, and the coup de gras - there is a "bulk entry" mode that lets you type in a whole bunch of one-liners (text delimited with a RETURN), and with a click they all get made into their own quotes in the same category.
Isn't it funny how worked up we can get about simplicity? Ah, the beauty of it. Thanks for a perfect plugin.