The Samsung Series 9 is a good example of bad design not just for the AC port but for many of the ports. We have a couple of the 15" models in the office and the ethernet adapter and mini-hdmi adapter are too big to effectively use at the same time with how close together the ports are. When both are plugged in, the ethernet adapter will typically be at a slight angle and not always completely connected. I realize they are meant for portability and so wi-fi is going to be used most of the time but if you've got big files to transfer it's a huge pain in the ass.