I absorbed everything (And I mean EVERYTHING!) Ayn Rand had written during my early to mid-20's.
Dabbled with Jung in my late 20's.
I really enjoyed reading Spinoza's ETHICS in my early 30's.........
........which led me to Wittgenstein's ETHICS.......
........which led me to Bertrand Russell (Who I ended up despising).......
.......which led me to his contemporary, Durant, and his works including THE HISTORY OF CIVILIZATION (Damn, that kept me busy for about 4 years!).......
.......which caused an interest in Political Philosophy, which led me to Kirk, Burke, Fukuyama, Newt, Sowell, Horowitz and the rest of the 'contemporary' crowd.
My heart still goes out to Rand because of her purity, although I now know her atheism is dead wrong and her Nietzsche-like God-hood is presumptuous, to say the least, and a dangerous precursor to Totalitarianism to say the worst.