For us, it's different every year wrt what succeeds and what doesn't. It depends on a lot of factors. Things we always grow are green beans, corn, potatoes, carrots, beets, all kinds of lettuce (some years we get in 3 lettuce plantings), tomatoes, cucumbers, green onions, and spinach. We've grown peas, garlic, peppers (never had success with peppers tho), turnips, cabbage, radishes, onion sets, parsley, basil, oregano, pole beans, pumpkins, yellow beans, brocolli and swiss chard. We use seed for everything and just plant it right in the ground on the May long weekend (Victoria day here in Canada) except for the tomatoes, which I buy as plants. Oh, and the garlic and onions - every year I get volunteers that appear as the snow melts, so I dig them up before we till and then replant them after.
The best things in our experience have been green beans, all the root veggies, tomatoes, cucumbers, corn (most years anyway), the lettuces and chard, spinach and onions. The rest sometimes work, the herbs were ok but not overly prolific, the pole beans went totally nuts but we didn't eat them, the pumpkins tend to grow so big then just rot. I'm sure if I was a better gardener we'd have more success with more things tho! I'm kind of a lazy gardener
