Things to try next year:
"Three Sisters" system of planting sweetcorn, runner beans and squash all together. The runner beans grow up the tall sweetcorn stalks instead of needing canes, and the squash gorw on the ground, crowding out weeds. Supposedly you get more yield in a small space than if you grew them all separately.
Blackcurrants. They're delicious and versatile.
Pink fir apple potatoes. Someone gave us some they had grown and we really enjoyed them.
Rainbow chard, ditto.
Potimarrons - you can get free seeds for these chestnut-flavoured pumpkins, as long as you promise to keep some and give some away to a homeless shelter.