Actually, my username, "Quatermass", came when I was finally branching out from my main obsession of Doctor Who. I decided to investigate the serials that preceded Doctor Who and find out more about them. The first three Quatermass serials were all transmitted in the 1950s-60's, and established the framework for the three main "alien invasion" stories....
1. The Quatermass Experiment, about astronauts who, on a test flight, get infected with an alien substance, and only one appears to return to Earth, is an example of we go to them. The movie starring Johnny Depp, The Astronaut's Wife, has similarities to Experiment.
2. Quatermass II, about gaseous-based aliens who take over the minds of humans, and who are infiltrating the British government, is an example of they come to us.
3. Finally, Quatermass and the Pit, about an ancient Martian spacecraft discovered to have influenced mankind's evolution, is an example of they were already here.
I chose the username "Quatermass" for the first board I became a member of, the "HackersDotCom" board. I was interested by hackers then (thanks to a book called Underground by Suelette Dreyfuss about Australian, American and British hackers, though I cannot hack worth a damn) but the politics on the boards forced me off eventually. I have used the nick on a number of boards, including the "Darwin Awards" forum. I decided to keep the "Quatermass" nick, as it's more distinctive and obscure than "the Doctor" or "Doctor Who".
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(No longer a mod)
On sabbatical...