I like tomatoes and peppers for salsa, but I only seem to be able to grow cherry tomatoes in abundance, but even those it seems like not enough. I can second the zucchini and squash. My first year I had four plants. Even the neighbors stopped taking them. Corn hasn't really done well me. The one year I tried to grow it, it was going okay then it all blew over. Last year we grew some type of Asian lettuce or something that was growing out of control, but we never really knew what to do with it. Pumpkins took over a good 1/3 of my yard, but they were carving pumpkins so it really just took a lot of water more than anything. It was cool, but we don't have the room for them just because they are cool. In the past I've grown peppers well, but last year they really struggled.

My neighbor across the street grew a whole garden in like 10 plastic kitty litter buckets (the bright yellow ones) and kicked everyone's but with his produce.