Ayn Rand was wrong in many regards - and her epistemology came after the definition for her philosophy, and should certainly be discounted as rationalization and little more - but any half-rational Objectivist will recognize that the philosophy should be regarded objectively, and her quite subjective views of personal values should be taken with a grain of salt.

Incidentally, if you're interested in her as a character, you may want to read We The Living (Which she herself described as a philosophical autobiography) - there are several hints scattered throughout it that she always had a love affair with power, that it was not merely something that she developed later in her life.