This doesn't technically qualify as a personal project, but I acquired a Inforce 6410 single board computer through training that was offered at work. The training was for writing OpenGL-ES graphic programs on a Snapdragon. The board is build around a APQ 8064 SoC running Android.
The development platform introduced was Visual Studio and vs-android. I was surprised by how easy vs-android made it to get C++ OpenGL-ES code running on an Android device. Sure, there was a setup and learning curve, but at the end there was no struggle with the Android SDK or NDK.
Start to end, no more than a few hours work. Fun!