I must prove my superiority.

You flick on their head and the hollowness within it echoes back.
They sleep when you want the lights on and they listen to music loudly when you want it off.
They leave their hair all over the place.
They think YOU are an alien when they're too base for even alien camps to let them in.
They talk. They never stop and that shrill voice rings through your ears till your brain hurts.
And when they shriek while talking on phone(ohh, by the way they're always on phone) the blob in your head that the doctors have diagnosed to be a cancerous tumour bursts and you get cured miraculously.
They're insecure. VERY insecure and they must tell the person on the other end of the phone the colour of their nail paint and occasionally they quip in "Haye Teddy, I love you baby!"

Then they face my judgemental eyes the ones that produce loathsome-laser beams and then they say "Haye shits this girl is a lonely bitch!"

Who are they? Hint: Starts with R ends with E and has OOMAT in between.

Disclaimer: The descriptions may not be right in several cases. In fact, it may be the other way round in your case