I used to really dislike walnuts. I was suspicious at their shape and they tended to have a bitter skin that I couldn't appreciate. Their brittleness also made them difficult to work into meals. I didn't like having them in salads because I didn't know how I was supposed to keep them on a spoon or run it through with a fork tine.
Recently though I tried some caramelized walnuts on pizza in one of these neat choose-your-own toppings pizza places, and it tasted great, contrasted the saltiness and brought it a more crunchy-starchy texture that I liked. I've heard that it's also rich in B-vitamins. So, maybe I just outgrew the dislike, maybe my taste buds were more sensitive to bitterness when I was younger.
I'm also not that fond of chestnuts on their own. The novelty's great, especially during the Christmas season, but they taste to me like sweet potatoes so I wonder why I don't just use sweet potatoes that give you more volume for less effort at getting out of its shell or skin? Of course now that I'm typing this I'm thinking of a meal that uses sweet potato that I can substitute chestnuts for.
I never knew that there could be caramelized walnuts on pizza, this interests me, I may try it if I get the chance! 
