Sony has some of the worst console deigns of all time. Seriously the PS2 slim has to be the worst console in history from practical design standpoint.
The power button is too small, set back too far so that you have to press it so hard the whole console moves. You cant see the controller inputs if you have a memory card in because it blocks it. The usb inputs are at the very bottom so you have to pick up the console to put them in properly....
Anything else? probably, never mind the fact its so flimsy a light gust of wind would blow the thing away....
PS4, instead of having a big prominent button saying *PUSH HERE TO START* with a huge light around it, opted to go for a TINY flush mounted wee thing with a tiny little led in it...
What the heck have Sony got against having a proper power button? Some of my best stereos have huge power buttons on them....it's like "PUSH ME AND SUPERMASSIVE EXCITEMENT WILL FOLLOW"....it's like sony don't even want you turning their consoles on...
(well that turned into a bit of a rant)