If I had limited my gardening to what I *already* liked, I would never have experienced fresh kale, among other veggies. The *only* kale I've ever eaten is that out of my own garden. I haven't even bought any from the produce store a block away!
And fresh peas are so $$$ that it really pays to grow them at home, even if you harvest sufficient numbers only for garnishing.
Fresh fava beans I had never purchased UNTIL I picked them out of my Square Foot Garden at MIL's house. WOW! Now I grow them here, I grow them there, and I purchase them as well, since the favas seem to have a difficult time making it back to my house from Palo Alto...I end up with a lot of compost material, but not many beans.
Hey, a driver's got to eat; right? (Another pricey veggie.)
Arugula. $$$, so grow it at home if you like it. Radicchio, ditto. Tomatoes, since even in season, the really good ones don't travel well and won't show up at the stores.
As to why people grow stuff they don't like: I have at least one answer to this. My strange gardening experiences in Atlanta (college + working) included a desperate need for quick success. My Man and I read seed packets like crazy and found that radishes had the shortest germination + days to harvest period, so we bought some radish seeds and put them out in (maybe?) March. By mid- to late April, we had radishes!
Only to discover that, despite their glorious color and odor, neither of us could stand eating them. *sigh* But at least we knew that
something would grow behind the house (where the southern exposure was).
Cynthia H.
Sunset Zone 17, USDA Zone 9