Everyone loves a great selfie! What's not to love? From a photographic standpoint, selfies are great because there is a main subject. There is no question as to what the viewer should be looking at. It's the person in the photo! Compositionally it works. The reason it works is because the Photographer cannot get the camera any further from their head (because of arm length), forcing them to create a main subject.
So we say hurrah to the selfies!