Hokkaido University and its botanical garden are very beautiful and peaceful escapes from the grid, and the Sapporo Beer Museum has some tasty food to go with its thirst-quenching fresh beer. There are baseball and amusement parks in the summer, and skiing in the winter. The island of Hokkaido has lots of nature including a volcano and two architectural museums - a historical village on the outskirts of Sapporo and the fantastic former prison in Abashiri. One last tourist area in Sapporo is Susukino, the nightlife area south of Sapporo Station. It starts a block or two south of Odori Park.
talked about in a different post. Note that during the day, Susukino is quite lifeless, but pictures at night are much more difficult to take.
Hokkaido is known for other foods - sea urchin, hairy crab, squid, salmon roe, and scallops are supposedly great here. Because of the milk/dairy industry, there are also Hokkaido cheese, butter, yogurt, and ice cream. Fruits and vegetables include corn (sometimes sold at tourist locations grilled on the cob), onions, and melons. Yubari melons are extremely expensive but very sweet - they are similar to cantaloupes. Note that lots of Hokkaido produce and dairy products can be bought in supermarkets across Japan. In addition to Sapporo's miso broth ramen, Hakodate has salt based broths and Asahikawa uses soy based broths.
A return trip to Hokkaido for me would include sampling more local beers, having Genghis Khan and trying more ramen, visiting the Historical Museum of Hokkaido and the architectural museum, another Fighters ballgame, and going back to Abashiri and Shiretoko for some nature, ice walking, and boat cruises. A budget airline makes visiting Sapporo for the weekend quite cheap, so it's possible I can make a return trip in a few months.