Yeah, awsome points to any game the includes a pirate faction, the ocean cities are somthing I miss as well, along with being able to raise/lower land (sinking a hostile city without a pressure dome was funny),
More than that though, there was just somthing about the atmosphere, the sheer unpolish to the whole thing, the annoying blip menus would make and the messyness of all the interface screens.
I do love the way these days though that the original can be bought for a fiver, while the expansion costs an arm and a leg.