I'll be keeping my PS3 because Dark Souls 2 isn't going to be on the PS4 for a long fucking time, if ever. That's almost a deal breaker for me on the console side because I'm guaranteed to enjoy DS2 more than any launch titles for as long as it takes until Dark Souls 3 comes out. Damn it.
I'll probably keep my haggard 360 around because I have a lot of games that I like for it and I may get the bug to go back and play Dead Space or RDR again at some point. Not to mention I won't be buying Microsoft's next console after the sorry fucking state the last one was in, so there'll be nothing with which to replace it anyways.
I gave my Gamecube to my father and, when he died, I didn't bother to get it from his girlfriend. I regret that, although the Wii is pretty much backwards compatible with its software, isn't it? I still haven't played Eternal Darkness or that fugly cell-shaded Zelda game.
His other girlfriend's kids kept his DS. I probably should have fought for that because the last time I had a Nintendo handheld console was during the Gameboy Color era. Damn it two times.