YES, love the shout out to Zack McCracken and the Alien Mind Benders! My first true adventure game back in the DOS days, seriously an awesome game.
Yeah - I loved Zak McKracken! The thing I remember most about about it was the Hare Krishna dude in the airport handing out pamphlets and doing the crazy spinny dance.
Another game I forgot to bring up that I really really loved was a sequel to Maniac Mansion - Day of the Tentacle! It had a time travel component to the game that was really well implemented and fun. Now THAT would be a great first adventure game for someone new to the genre; I highly recommend it to you noobs out there! Ah, memories. I miss my Amiga!