I agree with this and want to add two.
1. I hate it when you gank the lane and the person in lane has over 50% health and decides to run away rather then help kill the enemy champion. don't strand your jungler to die, help them
2. I hate when you gank bottom and instead focusing with you on the squishy they focus on the tank. focus on the damn squishy rather then the walking damage sponge, you can get 2 kills rather then helping the enemy with 2 or more kills.