I'll speak only for me, here, but Fallout 1 is the game that impressed me the most among these, during those times. It had to do with this idea that you could go anywhere you wanted and you weren't forced into a linear plot (somewhat a precursor of current day's openworld games).
Granted, I didn't know d&d back then, I guess if it happened now after playing d&d, Baldur's Gate would impress me more.
Granted, I didn't know d&d back then, I guess if it happened now after playing d&d, Baldur's Gate would impress me more.