I played The Witcher 3 at release, which was a huge mistake. I played for about 3 hours and experienced quite a few bugs. Finally I was in some cellar with Geralt and he just refused to use the ladder to get back up. I was stuck down there and my last save was like an hour before. I lost all motivation and figured if I wanted to keep going, I had to save every two steps or something, managing multiple savegames like in Bethesda games. I really didn't want to do that. So I quit the game and never touched it again. I'm sure it is a great game and all, but in my memory, it will be forever known as "The Glitcher 3".
As for the best game of all time, that is obviously Mega Man X on SNES. Level design is next to perfect as is the flow in gameplay. Simply unmatched until this very day.
Official member of VGC's Nintendo family, approved by the one and only RolStoppable. I feel honored.