Retail and downloadable games, same parameters for host consoles as Elf's GOTG thread.  Yes, it's another list thread, but play along chaps. 

I'm excluding stuff that I've bought, but have admitted to myself I won't bother to play/finish, such as Gears 3, Trine 2 (pile 'o shite) and Lara Croft & the Guardian of Light, or games I've currently got on the go (GTAV is coming on nicely; slow and steady wins the race).

I own (and genuinely intend to play, if at all possible) everything except Beyond Two Souls and HarmoKnight from the following:

360:

Sonic Allstar Racing Transformed.  5 hours is a pitiful length of time to have spent playing a game I liked this much.  I need to unlock more things.
Ghost Recon: Future Soldier: Had one session in co-op and loved it.  Allowed gold to expire and haven't gone back. 
Forza 4: 50/50 on this one.  I should probably sell the wheel while it's worth a decent chunk of money, but very little comes close to Forza + force feedback + custom soundtracks.
Sonic Generations: Heard good things, still intend to play my copy.

Looking at my XBLA hoard, it's a bit ridiculous.  Sales though eh?

Walking Dead Episodes 2-5.
Joe Danger 2.
Alan Wake: American Nightmare.
Apple Jack 2.  Bizarre that I stopped playing this, I loved it. 
Bangai-O HD: May have to admit defeat on this because I found it far trickier than the DC version.
Hard Corps Uprising.  Will hopefully get round to this in co-op soon. 
Mark of the Ninja: I would pay £40 for this, I'm looking forward to it that much. 
Outland.  Also looks like something I'd really enjoy. 
Shadow Complex.  Yes Retoking1981, I know.
Shank 2
Sine Mora.  Really enjoyed what I played of this. 
Switchball
Monster World IV
The Splatters

Super Meat Boy is the only game I've ever really wanted to get full achievements on, but as I think that's slightly beyond my skillset (*shakes fist at Dubs*), I'll settle for finishing the dark versions of the last two worlds.

PS3:

The Puppeteer.  Will definitely play this, looks great.
Beyond Two Souls.  Mentioned this elsewhere recently.  I think it'll be OK. 
Ni No Kuni.  Playing Fire Emblem has given me hope for this. 
Tales From Monkey Island episodes 2-5.  First one was fine, I thought - better than Escape From.
Renegade Ops.  Probably halfway through in 2-player - it's an excellent game.

Wii:

Motoheroz.  Great little game, got halfway through, will return to it in due time.


It's pretty obvious why I won't be buying a next gen console for a while.  Hopefully some of you are worse off than me.