Cruise for a Corpse is excellent. One of the best games of the time, and I would have loved similar games today. Where you have to solve the case before the cruiseship arrives at it's destination and so on. Or in a mansion, where nobody leaves until the case is closed. Add humour, and you have the perfect adventure-game.
But as far as Simon the Sorcerer 3D. What a terrible game that was. I will complete it sometime, when there are absolutely no other adventure-games I want to play first. That includes those I want to replay.