The advantages of one account are that you can share apps, music, and movies, and at the same time have different things on each iPad. But, first, click on FILE on the top left of the screen, and click Preferences. Select the DEVICES tab and check the box before "Prevent iPod, iPhones, and iPads from syncing automatically." Also, on the APPS tab for your iPhone make sure the box before "Automatically sync new apps." is not checked unless you both want to have all the same apps on your iPhones.Under the MUSIC tab check box before "Sync Music", and then check the box before "Selected playlists, artists, albums, and genres.". Then check the Artist or songs you want to put on your iPhone. That way each of you can have the music you each like on your iPhones. You can also do a similar thing with apps and movies.