Anger-driven development

Being angry at the badly written code stimulated me to a few hours of very productive refactoring and bug fixing. Do I need to get angry to be productive?

IOC container

I found a great idea in Dave Laribee's article in MSDN Vol 24 # 2: Don't use IOC containers for entities, only for services. I am saying this becase our team is practicing this for the last year or so.