For someone who came to libertarianism along some other path, this might seem a strange statement. It's true, though. I didn't set out to "become libertarian". I am what I am, and what I am turns out to be libertarian.
Sure, after I discovered that libertarianism exists (as more than just the "drugs, guns, and sex" that I had heard mentioned as "what libertarianism is") I was able to refine my views- it's funny how reading what those who came before you wrote will help that happen. But even before I read "Lever Action" by L. Neil Smith, I was already more libertarian than most of the nationally famous "libertarians" you'll encounter. I just didn't have a name for it, yet.
As I mentioned above, I had heard the term "libertarian" a few times over the years, but it was always in a dismissive way. "Those crazy 'sex, drugs, and rock & roll' libertarians". It was a caricature that bore no resemblance to the reality, and one that didn't interest me, but I never thought about it long enough to take a look for myself. Before the internet I'm not sure how I ever would have found out the truth, without making more of an effort than my level of interest would have fueled.
But, however it happened, I'm glad it did.