I've read some of her books, but I'm only familiar with objectivism in passing . There are some sound tenets in it that I appreciate like self-interest, reasoning requiring volition/free will, individualism, among other things though I get the impression it's very Aristotelian at its foundation.

Nothing wrong with that, just that sort of style of thinking can become to "closed-off" and in my opinion serves better as a starting point or frame of reference than as a system to follow.