There's nothing worth doing on an Android phone. I bought, I flashed ROMs, I customized, I am now bored with it and waiting for iPhone 5S. I find myself using it less and less everyday too.
I physically can't even use an iPod Touch (at least the 4th generation). Because the buttons are slanted all weirdly and make them hard to use and uncomfortable. I use AssistiveTouch on the iPad for that reason and use the cover to turn on and off the device. The iPhone 4 is much easier to use because of the boxy shape, but it was falling apart and I wanted a try of something different.
Android is good if all you want to do is go on Facebook, use Google Maps, read the news on Chrome/Flipboard/Feedly/etc, and check the weather. But there isn't a lot of apps that help you be more productive instead of just idling and going on YouTube, or again Facebook. I like that I can at least read through iTunes U material, maybe write something in GarageBand, edit something in endless ways in Snapseed, and jot some entries in Day One and have it sync over.
Right now on my S2 I have one game, Chrome, SoundHound, a tethering app, The Verge app, and the XDA app. Plus a weather app and doubleTwist Alarm Clock. Boring yeah, but I'm not getting into my reasons for not having Facebook/Instagram/Twitter/and YouTube on my phone.
On the iPhone, I had iBooks (for reading PDFs mainly), iTunes U, Day One, Snapseed, Figure, iMovie, GarageBand, Colloquy, Dozzzer, and some others.