-Anything tied to your Google account (Gmail, docs, map locations, all of your search history)
-What apps you’ve downloaded and any registration/purchase information for those apps.
-In some cases, the application data (this includes your solitaire scores).
-System settings and preferences
-Images/video
Things like your social security #, and banking info are not local data (unless your app gives you an option to save your ID) - that’s all held on the cloud and just being displayed to you when you are in the app.
Music AFAIK is not synced to the cloud either, those are just local files. This is why if you drop your phone in the toilet and restore from your Gmail, it will look and feel just like your phone used to - because almost all of that info is coming back down from the cloud.
Goal is to not make paranoid, simply informed. I recommend you watch the South Park HumancentiPad episode about what happens when you don’t read the terms of service agreements.
