Syberia: too slow for today's taste.
Antichamber: great stuff. I think i get brain cancer from playing this game.
Scribblenauts: fantastic game. It makes me realize that I'm not a creative person.
The Witness: gets bored because the lack of story.
Talos principle: the philosophy theme is cringey.
I play "The 7th Guest" often. I bought it from GOG.com and was a great investment. There is still the microscope puzzle bug, but that is avoidable by having the library book solve it for you.
Though not as popular, I'm surprised that it's sequel "The 11th Hour" didn't get at least a mention.
T7G was unique and I wish a company like Blizzard would get the rights and remake it.
I recently played Grim Fandango with my daughter. My impression was that some of the solutions are so outre and make so little sense that one could play for weeks without finding them. Beyond my patience level.
Some of the Leisure Suit Larry games also required a community effort, but we had a lot of fun trading solutions back and forth and most of them made sense. Well, there were those D cell batteries...