Everybody is obsessed with everything. It's the new thing.
A serious observation about it from an unlikely source:
"The word “obsessed,” tracked by Google Ngram’s search in books, sees a sharp rise from 1900 to 1920, then a slow and steady increase to 2008 (when Ngram data stops). The phrase “I’m obsessed,” however, is flat and low until the mid-’50s, after which it steeply ascends. The first instance of “I’m obsessed” shows up in the New York Times archive in 1967. There are four examples from that year, and then not again until 1969, in a Joan Baez profile. After that, they’re few and far between, with a five-year gap between 1980 and 1985, totaling just 19 by the end of that year. It heats up a little after that, but remains sporadic, with just 98 total entries through 2007. Then, around 2008, “I’m obsessed” takes off.
"It’s now entrenched in our everyday informal language, most often employed by young women, from InStyle’s daily “We’re Obsessed!” feature (one object of obsession: a $4,000 Fendi bag) to the ironically titled gossip site ImNotObsessed.com. A Twitter search for “I’m obsessed” at any time of the day will bring up approximately five results per minute (a recent sampling of obsessions deemed worthy for public display: cream soda, cardigans, ketchup, one girl’s own eyes)."
http://www.nytimes.com/2013/03/24/fashion/obsessed-youre-not-alone.html?pagewanted=all&_r=0
If gun enthusiasts aren't - in current parlance - obsessed, they aren't enthusiasts.