You have to have no brainers so you make sure you make a crop of something. But it is also nice to try one or two things each year to see if they will grow in your area.
I am trying surinam cherry, barbados cherry, Cherry of the Rio Grande, and Pitomba to see if any are good. They may all fail due either to not being able to take the cold or bad taste. If I do not like them I will give them to a fried and see if they like them. But I have always wanted to grow things to see if I can. Raspberries are not suppose to grow here but I have had some success.
I have noticed that on the years I have a cold winter I try to test the limits of higher chill hours. Last year was very mild and I am trying sub tropicals.