Patience was always something that Dean Winchester lacked, but his brother, Sam, seemed to be able to keep it under his belt.
Although Sam was the younger brother, he was somewhat more responsible than his older brother when it came to this area.
You see, Dean was very impatient.
He wanted to hunt as many evil suckers as quick as he could get his hands on them, he wanted to pick up the ladies the moment that option arose and most of all, Dean liked his pie hot and tasty, and not a moment too late. If Dean Winchester did not get his pie right away, or at the worst, not all, he was a very grumpy hunter.
But it was lucky that Dean has his pain in the ass little brother to keep him in tact, because if he didn't, Dean would be engulfed with insanity and nothing near sane…or well what you consider sane for a hunter.