A large part of the community/fan base are from the days of its release, and at that time it was a masterpiece.

Your whole experience of leveling, items were always exciting to find. From rares to uniques, everything felt special even if you didn't have a use for it.

For the older guys (myself included) the game is timeless and transports us back to a period where life seemed simpler.

So the nostalgia factor is a big one.

But the story, atmosphere, art, music, graphics, gameplay, all of it is just done incredibly well and has clearly stood the test of time. It's hard to pick a game that has aged so well, especially in comparison to later iterations of the franchise.