I have no clear-cut answer except...I'm just curious about it as a whole.
Even as a kid I was very taken with how it all looked - the architecture, the swords, kimonos, ninjas, all that. Then through high school I got into anime and I liked that pretty well (still do, just not as fervently) and then came the music...(Shiina Ringo <3) and as I matured as a gamer, I began spotting what I loved about Japanese tropes and stylings. I love their quirky premises, I love the innocent nature of their romances, I love their personality cliche's for their anime girls, I loved the design of their sci-fi and fantasy. And on the flipside, I loved seeing their take on darker things, as seen in Atlus and Grasshopper Manufacture games, and in manga such as Welcome to the NHK!
I dunno, I love the sound and look of the language, I love the look of the cramped architecture in places like Tokyo and the traditional style seen in Kyoto or in smaller towns, I'm interested in its myths and legends, its history, its nature, its mannerisms, its mahjong...(lol thanks Yakuza.)
It's a place of mystery to me, one that at times seems to take a lot of things from the West while putting an indelibly Japanese spin on them. And I'm just dreadfully intrigued by it.