Right, load up your rucksacks with iron rations, spikes, rope, flasks of oil and holy water. Oi, you at the back? Have you got a 10' pole. No? Oh, you've been eaten by a giant spider.
If you don't get this then don't worry. There is always time.
Getting to the point, folks have discussed the influence of Planescape (or 'Wordscape' as we call it here at The Schloss Monte) and BG2. Not so much about the shimmering palantir of win that is Icewind Dale. The influence of this game should be obvious: Dungeons.
Can we please have a massive, just-for-the-sake-of-it mega-dungeon? One that m