I haven't played Walking Dead (and have no interest) or Journey (and have lots of interest)
I really like all three of the others, but I would say ME3 is the best of them, and my GoTY so far, by quite a comfortable margin. Dishonored is let down by a poorly handled story and disappointing length, whereas AC3 lacks meaningful side content and characters, but still has an excellent main campaign and naval battles.
The ending aside, I loved everything about ME3 - the gameplay which took the best bits of ME1 and ME2, seeing all of your old teammates even if only for a short while, the fantastic cinematic moments, the surprisingly addictive multiplayer. And even the ending was fixed a few months on, free of charge, and I quite like how they ended Shepard's story now.
I think there's too much backlash about the ending/launch DLC for ME3 to be winning many readers' choice awards, but if I'm not mistaken the VGAs are chosen by a panel, so it has a very good shot.
(Former) Lead Moderator and (Eternal) VGC Detective 
