I used NN3 and 4 back in the day (and still do, kinda, Firefox is still my main browser), but man, writing CSS for Netscape was a nightmare!

I still remember that weird bug that forced everyone to create a single, empty, invisible DIV at the beginning of the page if you wanted to set absolute positions for the other DIVs in the page.

In Javascript land, we all had our little script to detect the browser and do things like finding the element you wanted (IIRC, only IE had find by id).

All in all, I miss the carefulness webdevs had to have at the time (I remember uglifying my files by hand to make everything weight less than 24KB, which was the self-imposed limit we had at the dotcom I worked at) but, in general, I don't miss those days at all.

NN didn't actually do CSS, it did JSS (Javascript Style Sheets, something Netscape hoped would fly) with an added translation layer. That meant that you could only style an element through its hierarchy (since there was no equivalent of IE's document.all in Netscape's DOM). $DEITY help you if you were trying to do a hybrid tables/CSS thing, especially with nested tables.