i liked that hugh herr was obsessed with climbing... but that after the accident and losing both his legs below the knee, he found out that it wasn't necessarily the climbing itself he was obsessed with. instead, it was the problem solving and concentration associated with climbing that he enjoyed so much, and that he was able to funnel that into so many other things. i'd venture to guess that most people's obsessions aren't necessarily really about that particular thing, even though you may not be able to imagine them doing anything else.