In a study participants were given a candy bar to either delivering a questionnaire that was a 15-minute walk away or delivering it just outside the room they were in but then needed to wait for 15 minutes to receive the reward. 68% of the participants chose to deliver the questionnaire just outside the room, but those who walked to deliver it reported higher on happiness scale than those who waited the 15 minutes. This experiment emphasis the fact that we prefer to take it easy but are happier when we work.
This certainly applies to me and I find that the days that I'm happiest are the days that I put in a full day of work even compared to days that I play all day. I feel better about myself and about what I have accomplished. The problem is that it is so hard for me to want to start to work, I would rather just play a game or be lazy. Another example of this is exercise. After exercising I feel much better, but it is so hard to actually start exercising.
I bring this up because of the characters in our books. They are hard wired to be lazy as well, but prefer to work (generally speaking of course). We need to write this into our characters bring out their reluctance to work and their desire to just sit around and be lazy. Of course if this happened too much we wouldn't have much of a book, but it would be fun to read about the hero taking a day off once in awhile :)