Another reason for resistance to a next action is the thought that you will lose momentum on a project by marking a next action as complete without planning the next action or moving to it. This recquires diligence to the weekly review and project planning.
Make sure you are doing the weekly review weekly and you are reviewing your context lists as you access those contexts. If not, you will go numb to them. (Remember, this isn't failure, you still have those lists waiting for you, we all fall off the wagon sometimes)