Wow, such great and interesting responses. I tend to try new stuff on cruises also, but was just curious if there was anything people had issues with. I don't eat sushi in general, but I think I would be even more iffy on a cruise ship. (Maybe I am being stupid)
I also avoid burgers in late afternoon after they have had a chance to sit a bit (if there is a big stack of them and no one in line, that is usually when I go for a hot dog). I feel better about hitting the buffet as early as possible too, just because of all the people that go through it.