Originally posted by: Garth
To a certain extent, I understand your problem because I was originally not a fan of sushi, and it took me some time to become accustomed to it.
Now, however, it is quite literally my favorite food. If you offered to take me anywhere for dinner, all expenses paid, I would choose sushi without question.
It might be worth it to put some effort into learning to like it. Start slow, perhaps just ordering some rolls like the california roll (no raw fish) or a spicy tuna roll where the fish is pureed and a bit easier on the palette. After that, move up to something like a rainbow roll where you can try a selection of whole fish pieces draped over a california roll. Eventually (or at least, hopefully) you'll be craving big pieces of nigiri sushi and sashimi like a homegrown Japanese national.
It's also relevant that the pieces your co-worker is offering you aren't hardly as fresh as they were when they were plated in the restaurant. Even as big of a fan as I am, I dislike sushi that isn't very fresh.