I know it's an old post, but dang, I have fond memories of Ultima VI: The False Prophet, that was the first PC game I ever owned. I got it for my 11th Birthday in 94'! I remember sitting at my sisters desk that week, with the unfortunate (but somewhat fortunate) luck to have pinkeye so I got to spend a great deal of time over the next several days exploring Brittania and causing all sorts of havok going on a crime spree >:D. I was evil in that game until I got a little older and I guess "mature" enough to figure out how it is played. Unlike all the RPG's I was used to at the time (mostly NES stuff like Dragon Warrior), Ultima was so wide open It's hard to figure out what you are to do sometimes.
I have fond memories of that game, like the time I died about 15 or so times stealing items and killing townspeople, and it must have done something like thrown the Karma counter into negative digits because when I was revived, my character sprite stayed dead, but was mobile, and much less killable. Someday I will HAVE to reproduce this and post it on youtube....behold, a floating, sleeping, Avatar. I have all kinds of other stories like my old 486 with Paradise VGA getting Non-Maskable interrupts....yet somehow U6 would still come back in a trippy, scrambled VGA palette, or running U6 on a Tandy 1000 8088 with full sound and 16-color graphics after spending $49 in Rat Shacks outdated catalogs in 1997 for a 256K memory upgrade to have the full 640K needed to run the game, or finding all the cool utilties from Doug the Eagle's Website and making an island castle just a few northwest of Moonglow.
Outside of U6, my list is long
Monkey Island 1 & 2
Ultima 7 Part 1 & 2
Ultima 8 Pagan
Microsoft Flight Simulator 5
Car & Driver
Depthcharge - by Henry J. Kottler...used to be on BBSes back in the 80's, came out in 84'. Looks more like an ASCII character battle on the screen of WP51!
Wolfenstein 3D
Duke Nukem 3-D
Maniac Mansion 1&2
Tank Wars
Sharedata Game Show Games (Wheel of Fortune, Jeopardy, Family Feud...etc)
X-Wing & Tie Fighter