Real answer: PC, since everything in it actually has a reason to be there. I fully customized mine's desktop with large, semitransparent, easy-to-identify icons of programs I use often with no names underneath, a little box in the corner that displays connected storage drives with capacity meters and speeds of data going in or out in bits per second, and 243 pokémon backgrounds I got for free, even though I don't have any pokémon games for PC. In the middle of a game I can hit alt+tab to minimize the game and do any of loads of things, and every active game or program shows up as a little tab at the bottom of the screen, as well as a clock that displays the date. The bottom of the screen also has permanent tabs for a program I can use to make a screenshot of any area of my screen and instantly upload it to the Internet.
All of my PC games are in a list in a program I can navigate with a controller or mouse. The store is in the same program, but if I feel like I can probably get a better deal, I can tell that store to suck it, and open a different store in this almost magical do-it-all program represented by a fox burning the earth. I can make folders, folders within folders, and arrange them and files visually or in a list, have them auto-arrange by countless criteria I will never care about, and so much more WOW