You might want to try Asian pears. They are very expensive but juicy and delicious. You can get them at farmer's markets and places like Whole Foods and Fresh Market, higher end grocery stores. Their skins are not as coarse as Bosch pears which are like a potato skin.
As far as blackberries like I said it's the most hit and miss fruit there is, possibly excepting cantaloupe, which you can never tell if it's any good until you open it and eat it, and anyone telling you other wise be telling witch's tales. Blackberries are great when ripe, but they seem to have a narrow window of being ripe and tasty or completely tasteless and gross. Strawberries are a hardier berry. Blueberries can get mushy and suck when mushy. I don't do mushy berries.