Beautiful city, architecture, food, people and wine. We did the tourist thing here to the max because well.. we are tourists.
Do the gondola trip if you're ever in Venice. It's not so cheesy as you might think. Oh, but get a bottle of prosecco beforehand to drink on board.
Think: full bottle of prosecco in 30 minutes while being punted down the canals of Venice = 3 hours of unadulterated giddiness afterwards.