I have a sushi addiction which I feed by getting it from the Asian buffet and sushi at our local supermarket. It's merely okay. I have had freshly made and lovingly shaped sushi and sashimi at a small sushi bar in California for a lot of money, and I can still remember the way the fresh fish melted in my mouth. It was divine. If I get to the supermarket later than usual the sushi has 'Manager's Special' on it and a reduced price. This means cut-rate sushi that's been sitting there all day.
I have actually gotten ill from eating sushi twice. You'd think that would stop me from wanting it all the time, but no.