These are apps that come with the stock Z3 rom and can be uninstalled with no ill-effects. I used Titanium Backup to remove these having backed them up first.
Xperia Chinese keyboard
Xperia Japanese keyboard
Xperia keyboard (make sure you have another installed and set as default)
Xperia Home (make sure you have another installed and set as default)
Xperia Lounge Pass
I welcome any more input. There are many I haven't removed either because I want them or I'm scared to, lol.