Kobe? One of the safest cities I've ever lived in. You can walk the streets at 2 in the morning without having to worry about being mugged or anything. I've never actually eaten Kobe beef... seems like a waste of money, okonomiaki is better...
The city is definitly much smaller than Osaka, which is easily accessable by train. The city is quite hilly the higer up North you get, near the winery, though personally, the best places for shopping, having fun, etc are near the sea, where theres Chinatown in sannomiya or Harborland in kobe, Kobe.
There is a lot of green, since a large part of Kobe has wilderness and isnt completely concrete, away from the city. There isn't evidence left from the earthquake except for the memorial down in meriken park. There is also a gaijin community in Shioya.
Oh, and I almost forgot about the Akashi-ohashi, though thats near the border of Akashi and Kobe, but the bridge does look great at night.