The Inefficiency of Doing What You Hate

Energy is used up in many ways. 

Distractions, stress, or just doing the work itself. 
Another one is doing something we hate. The internal resistance to the task will add on an unneeded burden to what you're doing. 
We may deem some things more plausible than others, but in the end the more efficient things might be to just do what we love. 
We'll get more done and be happier for it.