What is it about Yakuza games you like?

The reason that I've always been so fascinated by the Yakuza games has always been how amazing they are at putting you right in the heart of a Japanese city, and then just letting you go and do whatever you feel like. Even the little things like wandering into a convenience store are so authentically recreated that I end up feeling homesick for my home away from home.

So what is about these games that you enjoy?