(It helped that I only got a new commercial game every few months and maybe a couple of mostly short shareware games, so plenty of time to explore each one. Now I have a massive backlog of unplayed Steam games and still keep buying more.)
But not having hints and walkthroughs to fall back on definitely enhanced how much attention I paid to the game. I replayed various Lucasarts games from my teenage years recently and remembered a little bit from each section of each game, until I got halfway through Grim Fandango.
I knew I'd finished it before but the last two or three areas seemed completely unfamiliar, I think because I first bought it in the UHS Hints era, looked a hint up halfway through, and started leaning way too heavily on hints for the rest of the game.
This is true, but it made winning all the more satisfying. :)
Myst comes to mind as another game which was a beast to figure out. Once you did though, you felt like a god.
Completely agree. Unlike today, there was really no alternative to really thinking "deep" and trying to figure something out on your own. If push really came to shove, you went to the local bookstore and hopefully they had a magazine or guide available. I miss those times. :)