Quest for Glory II - marvellous with a lot of humour and
RPG-elements.
Rise of the Dragon - marvellous with no humour and no RPG
elements, but excellent graphics, gameplay and story (not
to mention how much more enjoyable it became when I got
my first HD!)
Actually, all of the "-quest" series of games are classics in
their own right. I played all of them at some point. But as
far as modern adventure go (when "point and click" became
fashionable), Lucas Arts are/were unbeatable. Monkey
Island I is still the best adventure game, all categories.
... But lets not forget Leasure Suit Larry! ;-).
.
SlimJim