WeatherStation, Vektan Slums, The Docks and that one area inside the Bamboo forest which was all brown like R:FOM were the ones made me drool at the time ! In fact The Docks has pretty similar feel to KZ2 ! The Mall was really cool too , with all the white and baked GI ! KZ 1 was sure a looker, but gameplay was a little repetitive. But then, even though shooting felt tighter in Black, it was KZ that I finished , Black is still lying unfinished.
The only thing I didn't like in KZ 1 was the sound of guns.
Yeah the docks with the snipers on the cranes was cool. And the bamboo forest was as close to a modern day (COD) experience as you got at the time.
As for black... I really enjoyed that as well. I got it for my XBox though. There was nothing to beat the sheer feeling of joy you got when you took an Uzi and demolished the toilet block