I don't hate sushi, but I don't see the appeal.
Well, let's think about Epcot for a second: What's the appeal? Essentially, the appeal is coming to understand
and appreciate other cultures. Culture includes architecture, art, hand-crafts, and cuisine, all of which Epcot showcases. So, right from the start, the appeal of sushi is how it helps, those who
allow it to, to understand and appreciate Japanese culture.
However, that's not all. Coming at it from another direction, put yourself in the mind of a Japanese person (pre-Americanization of their culture). This is a person for whom a meal meant rice with some protein, typically fish on it. (Not necessarily sushi, though, but still.) For
them, what's the appeal of an American-style dinner? At the start, it is the same: How it affords them the opportunity, if they're receptive to it, to understand and appreciate American culture.
There is no doubt that many Americans (especially) tend to cut themselves off from understanding and/or appreciating other cultures. However, even for those who don't cut themselves off in that way, Americans these days tend to not realize when something that they've internalized into their own culture is actually something that came from another culture. I suppose we subsumed so much of other nations' culture during the 20th century that it doesn't even register as such, any longer.
So putting aside the cultural aspects, what would be the appeal of sushi? As my signature indicates, I'm a vegetarian, so I don't eat (real) sushi any longer. However, when I ate animals, I did come to appreciate sushi and integrate it into my diet. What was the appeal? It was pleasurable to eat sushi. The fish was superior to any fish you'd get in the best seafood restaurants. (It has to be if it isn't going to be cooked, eh?) Each had its own taste, and just like you might develop preferences for certain cuts of meat or certain sauces, you would develop preferences for certain fish: The butteriness of salmon was my favorite. It had a flavor as delicate and specific as the finest French sauces. I also developed a strong preference for wasabi, similar to how I'm sure many Americans have developed a penchant for chipotle, or that certain smoky flavor of their favorite barbecue preparation.
While my ethical beliefs prevent me from enjoying eating any animals, now, I don't miss, in the slightest, steak fajitas, barbecue ribs, chicken parm, lobster, etc., but I do miss sushi, salmon nigiri to be exact.