Keep it simple.

etc.

I worked on a social gaming project a long time ago and one guy we had on that project was a flash design to actionscript3 convert, so programming wasn't his strong suit. Someone bought him a book on design patterns and he tried to implement every damn one of them in the same piece of software. It was bullshit of a fantastic level - everytime I hear someone fantasizing about design patterns over writing just simple pragmatic software, I can't help but think about this.