My favourite adventure game bar Grim Fandango has to be The Curse of Monkey Island. Despite it not quite going hand-in-hand with Monkey Island 2's plot, it had a brilliant mix of visuals (those cartoony but very nicely shaded backgrounds were awesome), audio (I still listen to the soundtrack alone often, it's beautiful), humour (a lot more "slapstick" humour than the previous two Monkey Island games, but still made me laugh out loud on many occasions) and of course - adventure.
Broken Sword 1 and 2 are also favourites of mine, although I haven't played them for years. Maybe I should leave it that way - it might interrupt the nostalgic memories of it or something.
And welcome to the network, TekXombie! Hopefully you'll stick around :>