I absolutely agree with many of the comments here - especially Simple To Use, and the requiring to join aspects but for me personally it is really about just sitting down to play. I have to jump through so many hoops - load screens, authorization, everything just seems to stop me from playing a game. Usually I have half an hour but if there is an update - whoo boy, forget it.
Wii really started to miss the mark on playability - simple seeming characters or interfaces, but the actual playability was somewhat complicated and required confirmation after confirmation or selection. Xbox 360 was soured from the Game Destiny - required online play and our internet is not the best. Every time I tried to play a >100MB update was required before I could even start!
I'm excited to see what happens with VR - that could change the landscape a bit.