OK,, now I seem to have a the main drain being Media Server. I only use Kindle, Skype, a live wallpaper, Chrome and very occassionaly some Google Apps and I have 2 games installed.
I have nothing I didn't have on my other 3 Nexus yet I never had this before, only difference is they APS are updated and a game is different, they may be configured differently, but don't see why.
I have 1 more new app called News Republic so have turned notifications off to see what that does.