This year I grew watermelons for the first time in yonks. Or rather, since only one plant made it past the seedling stage and it produced one fruit, I grew a watermelon. It was a bit of an afterthought and it was planted in a poor spot in the polytunnel so I did not expect great results.
I also grew cucamelons, and malabar melons and apples.
And here you can see the watermelon beside the cucamelon and the malabar melon.
I am rather ashamed about the watermelon. I will do better next year. Cucamelons are very fashionable and very easy to grow. They are wiry, untidy plants and crop quite well but the tiny fruits are rather thick-skinned and crunchy. They do taste of cucumber but the texture is slightly unpleasant. I would suggest them as a good thing for vegans to eat who miss eating gristle.
Malabar melons (Cucurbita ficifolia) is a wonderful plant with a great zest for life. It grows like crazy and produces lots of fruits. They are not edible though they are apparently cooked in syrup to make cabello de angel (angel hair) in Portugal and Northen Spain. I may have a go.