strawberries. A good crop money wise especially after second year when you either plant all the extras you bought first year, or get more via a seed-maker, and can start them from day one. But also, I like the real ones a lot (Caveat: The real ones that grow in farms around HERE... the ones from California that are huge and don't taste nearly as good are fine, but not the same). Pumpkins, too.
I haven't successfully grown any kind of squash in our garden, though, including pumpkins; my strawberry plant continues to live and put out leaves most years, but it rarely gets more than about 2 flowers, and the squirrels often get those 2 fruit before I can.