I love almost every kind of nut I've ever tried: black walnut, English walnut (which is probably the kind the original article refers to), pecan, cashew, pistachio, filbert/hazelnut, Brazil, coconut. I like peanuts too, but of course they're a legume and kinda-sorta don't count... but at least they're cheaper!) I think macadamias and chestnuts (the non-native kind) are okay, but over-rated.
I've never had pignolia/pine nuts or native American chestnuts (for a few years I belonged to the American Chestnut Society, which is sponsoring the breeding of native chestnuts with resistance to the blight which eliminated it as a major forest tree).
I have a black walnut tree on my property (a sort of house-warming present from the squirrels when I moved in)- and in my experience,
@Mischief 's post above is correct: I've eaten the nuts and they're quite good, but very labor-intensive!!! (I would leave a lot of them for the squirrels even if they were easy to hull and crack- their ancestors planted it, after all, so I figure they have as much a claim on it as I do.) But my tree, although huge, doesn't produce that many nuts- and after I pick a few up from the ground, first I have to remove the spongy husk (which stains my hands for weeks), and then crack them- and their shells are MUCH harder than those of the English walnut you get in the store. Maybe the unshelled nuts could be marketed as a low-calorie "diet" food: you use almost as many calories getting at the blasted nuts than you get back from eating them!!! But they are good- quite sweet and rich- not bitter at all. And Frances Moore Lappe, in her book "Diet For A Small Planet", noted that black walnuts have fewer calories for the amount of usable protein you get than English walnuts do.
I can imagine inventing new ways of growing different kinds of nuts. One of my sisters worked for a California almond orchard, and she showed me a picture of one of their machines. It looks almost like something out of a Dr Seuss book: there are sort of huge, oversize tongs coming out of the front, and they drive up to the tree, make the tongs clamp the trunk, and this thing vibrates/shakes the tree to make the nuts come raining down.