Monkey Island (i forgot which one, but it’s the one with the El Diablo Chicken)
Quest for Glory V : Dragon Fire
Quest for Glory IV: Shadows of Darkness
Quest for Glory III: Wages of War
Quest for Glory I: So Yo Want to be a Hero
…mm looks like I need to get out more often…
Plain ol’ ordinary D&D, as GM’d by any of three friends over the years. I’m old-fashioned that way. 
That’s -so- not at an adventure game. 
I spent most of my teen years playing any adventure game I could get my hands on. It’s a shame that no one seems to make them anymore. I think The Longest Journey and The Longest Journey 2 are the most recent ones I’ve played.
I love all of the King’s Quest series, but VI is probably my favorite. I was stuck at the yeti in King’s Quest V for at least 2 years, but I guess I even enjoyed that one.
I completely agree about Zork Nemesis. I also have Zork Grand Inquisitor, which is very amusing.
I love all of the Myst games, even the bad ones.
Has anyone mentioned Shivers and Shivers 2? Both excellent games that I have replayed many times. Along the same lines, I also enjoyed 7th Guest.
Torin’s Passage still gives me dreams of talking grass.
The Legend of Kyrandria series was excellent, especially the first one.
Zork Nemesis was scary but very good.
In addition to Monkey Island and Grim Fandango, I loved the mood and setting of Syberia.
The Inquisition: What a show!
Never forget who is the boss of you: Me! I am the boss of you!
Space Quest 5. Followed by many others, and a tear for the loss of the genre.
Space Quest 4 was probably my all time favorite. I’m also going to take advantage of this thread to shamelessly plug the brand new Monkey Island series, Tales of Monkey Island, which I have been and still am working on!
Have been giving this game a bit of a go, but I’m stuck. Help:
I need to make a copy of the control CD on to the cassette tape. I have looked up the solution guide, and it says I am supposed to do this in my apartment. So I put the CD in, I get a message saying “Ready to record” or some such… I then put the Control CD in to the stereo and play it… I take out the CD… but then when I go to take out the cassette tape, I get a message saying “The tape is still blank”. What am I doing wrong?
Scratch that… figured it out. Finally.
First one I ever tried was Leisure Suit Larry and I still remember it rather fondly.
The ones I enjoyed the most however was probably Hero’s Quest 1, Space Quest 1, Police Quest 1 and Day of the Tentacle.
Not being a native English speaker added an extra dimension to these types of games. I’ve spend countless hours with a dictionary trying to find the right word for an object. For some reason I actually lost interest when they moved away from text input.
Sam and Max Hit the Road is the best adventure game ever.
The other LucasArts games - Full Throttle and Day of the Tentacle - are good as well, but Sam and Max is the best.
I liked the Kyrandia series a lot - good puzzles and a light tone.
Dragonsphere was good, although it did not sell well.
The Fool’s Errand and 3 in Three, both by Cliff Johnson, were some great puzzle/adventure games. He’s been working on a sequel to Fool’s Errand for something like 6 years. One of these days, he’s going to send me a copy. 
Obviously the Monkey Island series is premium. I’ve been replaying them lately because I finished episode 1 of Tales of Monkey Island and was seriously jonesing.
One of the accidental aesthetic values you got from the old LucasArts games was that the graphics only allowed for so much mugging in reaction, which often created a hillarious sense that Guybrush was maintaining a deadpan expression in the face of the absurd things happening around him. Flight of the Amazon Queen also had this quality. But with better graphics, it would now seem odd for characters to appear not to react to bizzare events.
Let me caution you about the new Monkey Island Special Edition. I am among the many people who can’t run it because it constantly throws up the menu, and it won’t run at all on processors even a few years old. So far, LucasArts seems to be doing squat about this. Well, they got my money, so why should they?
But here’s a brief dashed-off list:
[ul]
[li]Discworld - If you got through this without spoilers, you may wish to check whether your pants are on fire. [/li][li]Flight of the Amazon Queen - Does for the Cliffhanger-style adventure what Monkey Island did for pirates. [/li][li]Grim Fandango - The controls were often kind of awkward, but it’s funny and offbeat, and will be a fondly remembered classic.[/li][li]Sam & Max Hit the Road - This is the first adventure game I can remember that was open about the amorality of adventure game protagonists. They get away with it because Sam and Max are so cuddly. Funny as all get-out.[/li][li]The Longest Journey - They pulled off a remarkable balancing act here. Adventure games tend to be either too easy, and so not worth the money, or hard enough that you mostly experience frustration. And if your game isn’t even primarily a humorous game, that frustration isn’t even broken up with comic relief. But The Longest Journey gets it just right. [/li][li]Syberia - Beautiful art, interesting puzzles. I hated the end of Syberia 2, but what are you gonna do?[/li][/ul]
Then stop posting and get to work, you cur. I got swashes that need buckling.