You really need to be in the right "mood" to enjoy these games.
I started with Myst several years ago and I stopped playing fast because I was bored out of my mind then a couple of years later (2005 i think), I bought the trilogy on DVD for like 10$ and I was blown away by Myst. The back story, the puzzles, the music, all the little details.
I have no idea how that happen.
Then, I played Riven and to this day it's the most engrossing gaming experience I ever had. It was magical. EVERYTHING on the island is connected somehow.
I bought the book "From Myst to Riven" on ebay for 100$ and the amount of work they did on Riven is astonishing, I missed so many details when I played it. Riven was high art, a real achievement.
I still get goosebumps when I think of Riven, it's up there with masterpieces like Okami, Shadow of the Colossus and BioShock.
I never played the other games in the series but I bought them all on sale, I'm just not in the "mood" to play them.