Every year is different and has various successes and failures, mine are:
Onions - I grow mine from seed, and they all grew to a fantastic size, the larges being a Sweet Spanish Yellow which was 2lbs9oz when I weighed it ...BUT...... a lot of them went to seed this year as compared to only three or four last year. Watered well, but didn't like the extreme heat, I think.
Bramley cooking apples: Only three on the tree last year, but around thirty kilos and counting this year!
Carrots, finally came good after three attempts at getting them to germinate, but despite keeping well watered a lot of them are strange shapes.
Radish - total waste of time, they went old before they had grown properly. Heat again, I think.
Squash: Buffy Ball squash: A small squash, very prolific, BUT: Impossible to get through the rock hard shell, even after trying to bake them with shell on (after having punched some holes in case they exploded in the oven). Managed to get into one to be greeted with very little insipid flesh that tasted of nothing at all. One to avoid next year!
Dwarf beans cropped amazingly well, but runner beans went old very quickly
I work on the theory that if I grow enough of a variety there will always be something to pick and eat, so I don't get too disappointed over the failures - there's always next year.