That is to say, how were you introduced to the awesomeness? Tell the epic story of the beginning of the end, or the götterdämmerung of non-fandom.
For me it began one dark night, spacing out in front of the computer. I had nothing to do and the future looked bleak. Oh, woe all the days of inactivity that had stained the last months of school, were as it was meant to be a place of free thought it instead had yielded to the unspeakable horrors of homework that plague us, the lazy ones.
But then, like thunder on a clear monday morning, an idea struck me. What if I would check what animes were currently airing, get a little colour on these so grey days, and get a good reason for not doing the unspeakable horrors of the aforementioned?
So I ventured forth, took my pride and dignity and threw them away, surfed through the nebulas of the interblaggs and arrived at the doors of the vaunted empire of Animenfo. There I searched, tedious and unyielding, even in the face of the odds, and I found two candidates; The Melancholy of Haruhi Suzumiya and Welcome to the NHK.
As it were, both turned out to be amazing, both were based on literature, and both made me drool in anticipation of another episode. Which turned out on top? That is up to individual opinion, my dear friend.
Although I'd say NHK. Suck on that!