If it doesn't have vinegar rice, it's not sushi. It might be sashimi or other Japanese or Japanese-influenced food, but the vinegar rice is what makes it sushi. It follows that if you dislike vinegar, you probably won't like sushi.
I no longer push people to try things, because even if they don't say "I've had X before and didn't like it, and I don't want to try the version at your favorite place so you can convince me that the other 8 places don't know how to make it," they may just not be in the mood to be adventurous that afternoon. I'll ask if someone wants to try something, or offer a bit of mine if I have extra, but I'm trying to be generous, not demanding. [None of this applies to those of you who are trying to convince your four-year-olds to try new foods; this is me, as an adult, talking to other adults, or children who are not in my care.]