Personally I never grow F1's if i can help it as they all crop at the same time and are uniform in size, taste is not usually an F1 requisite either.

This year I have grown Heirloom purple podded peas, golden podded peas, butter beans, borlotti beans, pink fir apple potatoes plus others i imagine.

None of the other 15 to 20 kinds of veg that i grow on my allotment are F1's