I pretty much bought it Day 1 and played right through it. Never came back, though. While I enjoyed it I felt it was completely overshadowed by the masterpiece that was BG2. Granted they are very different games. BG1 is about the low-level D&D experience which has its peculiar charms.
I think the extreme advantage of ranged weaponry (bows! bows! bows!) and the exploitable fog-of-war creep approach left a bit of a bad taste in my mouth.
What I chiefly remember now, apart from “You must gather your party before venturing forth,” is a few other snippets of voice work: “Somebody get me out of this hellhole!” “Spare no one!” “Shall we continue your lesson?”