Before you begin reading, I have two confessions to make:
1. I was a fan (although not a very die-hard one) of Fall Out Boy before I heard this record.
2. I am fifteen and I am a girl. But I like this band for the music, not for their looks.
That being said, I thought this album was fantastic.
Pete Wentz's lyrics are complex and interesting, and although the album is heavy on the political and social commentary, they're still thought-provoking. The best lyrics on the album are the comedic ones in "America's Suitehearts" and the sincere ones in "What A Catch, Donnie" and "The (Shipped) Gold Standard."
Patrick Stump's melodies are much better than they used to be. Although the singles on From Under The Cork tree were great, the other songs tend to flow together. Nobody could accuse the songs on Folie a Deux of all sounding the same. He does a good job of balancing Pete Wentz's heavy lyrics on songs like "I Don't Care" with bright melodies but still connecting the two elements with the classic guitar riffs that are so typically Fall Out Boy. It's also nice to hear an album written by somebody who so obviously knows their music theory. Musical highlights are "20 Dollar Nosebleed" and "(Coffee's for Closers)"
There are also the choruses (repeated several times), guitar riffs, and written-for-live lines ("Detox just to retox" and "I will never believe in anything again" being two big ones) that are so characteristic of Fall Out Boy.
Finally, there's a pre-gap track, called Lullaby. Not only is it a really good lullaby, but it can also only be played on CD players (There are plenty of tutorials how on YouTube). You can't buy it from iTunes and you can't download it onto your computer from the CD. It's nice to see that at least someone is making an effort, however futile, to stop the complete digitalization of music and the arts in general.