I hated a lot of vegetables early on, because I only knew the canned variety, while growing up! Let's face it, most canned veggies are already overcooked, but back then they would get dumped in a pot, with the horrible liquid, and boil them another 30 minutes, smelling up the entire house (or neighborhood?). I think that's why so many people hate brassicas (especially Brussels sprouts), even now, when they can get them fresh year round. Besides the canned versions, I can't think of any that I didn't like, except beets - something that I have never liked, even various types I grew myself, as they all tasted like dirt! Yet the greens, and Swiss chard I love, and have none of the flavor. I think it's a genetic thing, like the cilantro tasting like soap to some.