I'd bet that "gonna make you his bitch" comment was just a lame attempt at sounding modern-cool (while hyping his game) that backfired though, and doesn't necessarily indicate a massive ego
I think it's pretty well established that Romero had an pretty big ego. I suspect, initially at least, the fame/money went to his head. I think it's possible the colossal failure of Ion Storm might have reset it. Especially since he's managed to keep himself blended into the background since then, unlike Mr. Smart. For the record, I looked it up and the exact quote is, "John Romero's About To Make You His Bitch."
Carmark will be spoken about with reverence for years to come -- justifiably so.
American McGee was just an easy name to remember. I know he later did that "Alice" game and IIRC did gambling software after that...
“If you think adventure is dangerous, try routine. It is lethal". -- Paulo Coelho