KQ1 was the first for me.... WAAAAY back in the day.

Beloved Tandy 1000, where are you no--- oh wait, you're in the next room.
Aside from the KQ series, Police Quest and Space Quest have solidly shared
the position of favorite adventure game series with KQ... I loved them all for
various reasons... Nothing quite like bringing a serial killer to justice... stupid
Baines. Nothing like shoving a ladder down your janitor overalls and being
mocked in hilarious, tongue-in-cheek ways. The Laura Bow series also has
a soft spot in my heart, though not as prominently as the others do.
Travesty though it may be, I never actually played the GK games.
I wanted to slaughter Cedric through KQ5... and I REALLY want to disable the
voice for him because I don't want to listen, but I want to play the game again
I just can't stand his voice. *sigh*