Oh, i think you confused something... facebook, google+, play music (samsung also have music app), play movies, hangouts, drive, youtube(i rarely use it mobile), google photos, gmail(for people who doesnt have one)... (and for other devices there is google books and etc.)
I have quite a few disabled on my phone. I really don't care for Google play music, Movies, Magazines and Books. For music I currently use the OnePlus music player, on the Galaxy S2 I use the CyanogenMod one.