I read Fountainhead, Anthem, some of Rand's polemical tracts and skimmed Atlas Shrugged when I was ... 15? 16? and I can say it did change my outlook on life in a way, in that it sort of forced me to think through why I didn't agree with her philosophy. I also admire, and have been somewhat influenced by, Rand's forceful and effective nonfiction prose style.
I have to admit to a fascination with libertarianism in general. I've never really bought into it, but intellectually it's always held a curious attraction for me. As has communism, actually.