It's not really surprising to me that people tend to seek out games that parallel their real life tastes. Jocks like sports games, car enthusiasts like racing, etc. What shocked me was how this affected me, as I don't fit into any of the prototypical molds so to speak.
Among some of the hobbies I enjoy, martial arts are one of my favorites. Though I started with the intention of being able to snap necks with my toes, my taste evolved into the more stylish and physically demanding, a Brazilian martial art called Capoeira. Though Capoeira has a variety of incarnations, the essence is basically that it is both a dance between two players, there is constant movement, and it focuses on gymnastic movements, such as flipping or cartwheels. I've been doing Capoeira for about a year and some, and I've enjoyed it immensely, so when I discovered that Tekken has a character that fights using Capoeira, I got hooked. I'd played Tekken before, but never really noticed until I was fooling around. Since then, Eddie Gordo has been my man pimp, and I'm excited for the Tekken coming out on the PSP.
In addition to Capoeira, I enjoy breakdancing, though I can't find a good place to do it or somebody to teach me the harder stuff. Still, I enjoy watching and performing because of its relative difficulty and exotic movements. About a week ago, I found a upcoming game for the PSP about breakdancing, and I got really hyped. It's featuring some of the greatest dancers in the business, slick looking moves, and wankers getting served. I'm excited to see the game develop, even though it's most likely going to stink.
Obviously this isn't the norm for marketing, as I'm sure people aren't going to be secret operatives or warriors fighting the horde or whatnot, but games that cover real life interests of mine are exciting and addictive, as it gives me the chance to not only spot flaws or excellence, but also indulge myself in my digital skills.