By the time the fourth season DVD set came about, I knew all about aspect ratios, commentaries, special features, video quality, etc. And I was among the many disappointed with a lack of widescreen presentation, until the Season 4 set came with a note by Joss that basically said, "Look, they were shot in 4:3 fullscreen, and I want them preserved in their original aspect ratio." It was sort of a 'duh' moment for me, but helped me realize exactly how obsessed I was with the program (and DVDs in general). When the sixth season was released, I was a hound rushing through the set watching every bonus feature, reading every facet of information, listening to commentaries, renting analytical books on the series from the library (mostly by Nikki Stafford). And as Buffy ended with its seventh season, my attention was turned towards Angel for its final season, and I retroactively rewatched all the prior season episodes.
Buffy was a great show, and definitely worthy of being my first show obsession. I have multiple friends who, once they've watched a season or two, become hooked to the point they splurge on a Complete Series box set or buy them individually from Half Price Books or some other retailer. It's a highly addicting show, and I can't help but give Whedon, Marti Noxon, David Fury, David Greenwalt, Jane Espenson, and Jeffrey Bell (amongst others) their duo kudos.