[Ouya Q&A, Help & Troubleshooting] Ultimate Chicken:
List of stuff in system/app that you should/shouldn't delete.

All at your own risk, thx.

Notes:

- If my Galaxy S2 and Acer Liquid are of any indication, deleted apps stay deleted through a factory reset. BACKUP FIRST!

- ROM updates will most likely restore those deleted apps along with trashing your root. <_<'

- The Ouya stock ROM is odexed. You MUST delete the odex as well to excise the app completely. (You probably want to clear app data before deleting too, if you can.)

- I have the Xposed Framework installed, complete with Play Store and all that. I think I excluded all the files I pushed into System/App, but tell me if I made a mistake here.

Get rid of them if you feel like it

NoiseField.apk / .odex (Live wallpaper, android default)

MagicSmokeWallpapers.apk / .odex (Live Wallpaper, android default)

HoloSpiralWallpaper.apk / .odex (Live Wallpaper, android default)

VisualizationWallpapers.apk /.odex (Live Wallpaper, android default)

LiveWallpapers.apk/ .odex (Live Wallpaper, android default)

??? I think I shouldn't touch these but they don't seem necessary ???

Phone.apk/ .odex (...why is this here? The Ouya doesn't do GSM/CDMA voice...)

OUYAOOBE.apk/ .odex (OOBE = Out Of Box Experience, the setup program you go through on first run. Keep for Factory Reset safety.)

OUYAKeyboard.apk / .odex (I think this is the best IME you can use with the controller. Don't get rid of it.)

OUYAWallpaper.apk / .odex (OuyaLauncher is hardwired to use this Live Wallpaper, and I really don't wanna find out what happens if I toast it.)

Galaxy4.apk /.odex (Is this a Live Wallpaper?)

LiveWallpapersPicker.apk/ .odex (This one allows you to select Live Wallpapers that you installed. Ouya's stock launcher doesn't care, but if you're using BAXY, KEEP THIS)

SoundRecorder.apk/ .odex (The Ouya has no mic port but does support bluetooth headsets and their mics...)

UserDictionaryProvier.apk /.odex (SPEL CHUCKER)

VpnDialogs.apk / .odex (I think this allows you to VPN into your device. It may come in handy... if I ever learn how to use this function. :3)

!!! Do not touch !!!

MusicFX.apk / .odex (This is your "sound driver")

OuyaLauncher.apk / .odex (System UI, he who removes this - good luck, I can't help you)

PackageInstaller.apk /.odex (Unless you want to lose your ability to install .apks you copied into the device...)

Settings.apk /.odex (You get rid of this your business)

SettingsProvider.apk / .odex (see: Settings)

ApplicationsProvider.apk / .odex (Do you want to NOT run anything?)

BackupRestoreConfirmation.apk / .odex (Android's backup/restore interface. May be useless since Stock Ouya has no Google connection. Not touching because I'm not sure.)

Bluetootk.apk / .odex (Look I know ICS/JB Bluetooth has issues but at least the hardware's usable...)

Browser.apk/ .odex (??? ...not touching)

CertInstaller.apk /.odex (Since a lot of the good stuff is signed these days, don't get rid of this...)

DefaultContainerService.apk /.odex (??? ...not touching)

DownloadProvider.apk /.odex (unless you don't want to download anything ever again...)

DownloadProviderUi.apk/.odex (This one kicks in if you try to download a file from a web browser...)

DrmProvider.apk/ .odex (As much as I hate DRM, I'm leaving this in here just in case some DRM protected media files won't run...)

HTMLViewer.apk/ .odex (This is Ouya's internet browser, I think...)

InputDevices.apk /.odex (Unless you want your Ouya to become a paperweight...)

KeyChain.apk /.odex (Linked very closely to CertInstaller)

MediaProvider.apk /.odex (Music/Movie playback backend)

NetworkLocation.apk /.odex (I think this is the Assisted part of AGPS. It's also what allows Google Search to fuzzy your location if your GPS is off.)

NvCplSvc.apk /.odex (Rule of thumb, NEVER remove files with arcane names, because it could be the OS maker obfuscating an important system app...)

SharedStorageBackup.apk /.odex (???)

SystemUI.apk /.odex (... trust me, you don't wanna)

Ouya's firmware is actually quite clean and barebones, I'll give them that! No goddamn telco bloat!

Don't worry about getting rid of Live Wallpapers unless you really like the android defaults. You can always pull the APKs from another device and use them. Just don't get rid of the Picker if you want to keep using LWPs. (I suggest keeping the OuyaWallpaper, which happens to be an LWP, to keep the Picker happy.)

If I make any mistakes here, feel free to correct me.