On the Amiga -
* Dungeon Master (excellent - Not too hard - love it to pieces
* Eye of the Beholder (Initially I thought hmmm. not as good as DM but it grew on me)
PC - The order that I played them in... Ultima VII is my all time fave.
* Ultima Underword II
* Ultima VII - The Black Gate!
* Ultima Underword I
* Baldur's Gate