Really great point, Mike. It's probably preferable not to load your plate to the brim before deciding you're not hungry for this sort of thing, but you're absolutely right—no need to feel obligated to stay just because others are enjoying themselves. My mom used to encourage me to try some dishes several times before making up my mind. I'm glad she did, as things I didn't initially care for became some of the things I now enjoy. However, the decision of whether or not to pursue should be left to the individual.
Gratefully, my Mother was the same ... regardless of how many times I tried to eat liver though it still wouldn't go down! Proraso is unfortunately my liver ... I stubbornly tried it for far too long. Fortunately, there are other offerings a plenty ... . [edit: grammatical]