Joe Hewitt, the man behind Facebook Mobile for both the iPhone and Android, hates Android. And the iPhone. And judging by his twitter feed, he also hates people, kittens, unicorns, and the Salvation Army. Just kidding - but as Chris says, he's definitely a "negative nancy." (Yea, we're going for the high-brow stuff today).
Ouch. This is the same guy who left Facebook's iPhone dev team because of Apple's tyranny. I'm not a programmer, but I can't imagine any system is perfect to code for, and frankly I haven't heard any other devs complain about coding for Android.
That's an unedited snapshot of his twitter feed.