Fruit & Fruit Trees

Not necessarily your favourite fruit to eat, but what is/are your favourite fruit tree(s) to grow based on survival rate, fruit yield, ease of maintenance, ease of harvest, grass-killing prowess, and any other combination of factors? What is/are your least favourite? If you have photos or diagrams to illustrate your point, even better!

(If you provide your region and/or Köppen-Geiger or Trewartha climate zone, it will help others to know what to plant or what to avoid!)