Good Code vs Bad Code

Sometime I talk with my programmer friends about data structure and design patterns and good code. I think there is good code but it does not matter if you see it at first it takes sometime to understand it. thats why if you start swearing at someone's code who worked the place before you. no matter how was good that code was. here is a good explanation of that situation :)
at the end there is no looking at code and not swearing :D