Laughs I'm an Objectivist by my own accord, but I may be able to help if you find this undesirable.
The shortest - her derivations from her axioms have a lot of implicit and unmentioned axioms thrown in ad-hoc. One problematic case is her defense of property - she implicitly assumes no other mechanism of proper existence for humans is possible. (And her "proper existence" is really slippery.)
This isn't necessarily a rejection - as mentioned, I am an Objectivist - but it is something you need to be aware of and watch out for in her writings. If a conclusion doesn't seem to be quite right or doesn't square with your own conception of ethics, try to figure out what implicit axioms are being slipped in.
Reading Ayn Rand may be the best cure for Randianism, if Objectivism isn't a natural philosophy for you, which by your apparent distress it isn't. (Honestly, though, I'd stay the hell away from most of the critics, who do an absolutely horrible job of attacking the philosophy. They might be able to cure you of Randianism, but largely through misinformation and unsupported emotional appeals, which may just result in an even worse recurrence later.)
Please correct me if I'm wrong, but it seems to me that she also did some variant of "Spock Rationality". More precisely, it seems to me as if her heroes have one fixed emotion (mild curious optimism?) all the time; and if someone doesn't, that is only to show that Hero1 is not as perfect as Hero2 whose emotional state is more constant.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.