Well, the game I have played the longest, and still play with some regularity, would have to be Star Trek Online. In terms of overall polish, story, characters and quality, my pick is Witcher 3: Wild Hunt. The most fun I had in recent time with a game: The 2016 reboot of DOOM. A bit further back in time, it was Splinter Cell: Conviction Nostalgia wise, the favourite game of my past, is the SNES game Terranigma