I've never been a huge point-and-click fan myself though they can be a fun diversion sometimes. I remember a little later when Myst was all the range but I had absolutely no interest in that game. I had a friend that had a game called Phantasmagoria though and that one, another horror themed game, always looked pretty interesting.
GOG has lots of great stuff though there's lots more that it will probably never have. Games that use licenses from movies, comics, etc. are perhaps the most difficult to get re-releases for. I'm sure there are all kinds of legal hurdles that just makes it not worth it.