Sounds like we had very similar tastes in games! I confess, I don't remember the Gabriel Knight story line, but I do remember playing and loving those, too.
You also reminded me of the idiosyncrasies that I remember fondly, though they could be annoying at the time. Getting the same error sequence, or having to watch the same cut scene over and over. Having to switch out discs periodically, because the whole game didn't fit on one. Getting to a point in the game where you needed something from an earlier scene and having no way to go back (looking at you, Leisure Suit Larry)....