I use to never replay games, until I accidentally replayed a Nancy Drew that I did not remember I played before, I was surprised how much I enjoyed it the second time, so I started to replay many of them, I would not like to play as much, If I remember to much of the solutions, one advantage of a slipping memory, I enjoy games and movies more the second time around LOL..
I am a BIG GK fan also, thinking I need to dig it out , 2 is also my fav, I loved the feel of it, it might go beyond the puzzles for me, as I just love the feel of it, the Characters are so AWESOME, the places so memorial.. but any good puzzle game, that I dont totally remember the solutions, are great for replaying... I recently played a new game, and I wouldn't even call it a game, it was mostly story, it was so disappointing, it has some good reviews but where was the gaming??? anyway, still spent a few hours on it, it was short also, so definitely wont replay it.. it was called "GONE HOME"
so excellent stories, but mostly great puzzling motivates me to replay, thinking there are alot of early games, I need to pull off the shelf again
one fortunate thing for me, is I dont care as much about the current graphics or voice acting, my favorite part of games are the puzzles, so that makes playing some of the older games fun, I started playing many years after some of them were made, cant think of names right now, see I have a TERRIBLE MEMORY LOL..

am grateful for others reviews and game shout outs..